<!DOCTYPE html>
<html>
<meta charset="utf-8">
<head>
    <style type="text/css">
    /* STYLE_GLOBAL_PLACE_HOLDER */
    </style>

    <style type="text/css">
    /* STYLE_OUTLINE_PLACE_HOLDER */
    @keyframes flash { 
  0% { color: rgb(128, 203, 196); }
  10% { color: rgb(0, 137, 123); }
  40% { color: rgb(0, 137, 123); }
  50% { color: rgb(128, 203, 196); }
  60% { color: rgb(0, 137, 123); }
  90% { color: rgb(0, 137, 123); }
}
.highlighted-anchor { animation: flash 1s; }
body { margin: 0px auto; font-family: Verdana, Helvetica, sans-serif, Tahoma, Arial, Geneva, Georgia, Palatino, "Times New Roman", "Hiragino Sans GB", 冬青黑体, "Microsoft YaHei", 微软雅黑, "Microsoft YaHei UI", "WenQuanYi Micro Hei", 文泉驿雅黑, Dengxian, 等线体, STXihei, 华文细黑, "Liberation Sans", "Droid Sans", NSimSun, 新宋体, SimSun, 宋体; color: rgb(34, 34, 34); line-height: 1.5; padding: 15px; background: rgb(245, 245, 245); font-size: 16px; }
h1, h2, h3, h4, h5, h6 { color: rgb(34, 34, 34); font-weight: bold; margin-top: 20px; margin-bottom: 10px; padding: 0px; }
p { padding: 0px; margin-top: 16px; margin-bottom: 16px; }
h1 { font-size: 26px; }
h2 { font-size: 24px; }
h3 { font-size: 22px; }
h4 { font-size: 20px; }
h5 { font-size: 19px; }
h6 { font-size: 18px; }
a { color: rgb(0, 153, 255); margin: 0px; padding: 0px; vertical-align: baseline; text-decoration: none; word-break: break-all; }
a:hover { text-decoration: underline; color: rgb(255, 102, 0); }
a:visited { color: purple; }
ul, ol { padding: 0px 0px 0px 24px; }
li { line-height: 24px; }
li ul, li ol { margin-left: 16px; }
p, ul, ol { font-size: 16px; line-height: 24px; }
pre { display: block; overflow-y: hidden; overflow-x: auto; }
code { font-family: Consolas, Monaco, monospace, Courier; color: rgb(142, 36, 170); word-break: break-all; }
pre code { display: block; overflow-x: auto; padding: 0.5em; color: rgb(34, 34, 34); background-color: rgb(224, 224, 224); border-left: 0.5em solid rgb(0, 137, 123); line-height: 1.5; font-family: Consolas, Monaco, monospace, Courier; white-space: pre; }
pre code.markdown-metadata { border-left: 0.5em solid rgb(128, 203, 196); }
aside { display: block; float: right; width: 390px; }
blockquote { color: rgb(102, 102, 102); border-left: 0.5em solid rgb(122, 122, 122); padding: 0px 1em; margin-left: 0px; }
blockquote p { color: rgb(102, 102, 102); }
hr { display: block; text-align: left; margin: 1em 0px; border: none; height: 2px; background: rgb(153, 153, 153); }
table { padding: 0px; border-collapse: collapse; }
table tr { border-top: 2px solid rgb(204, 204, 204); background-color: white; margin: 0px; padding: 0px; }
table tr:nth-child(2n) { background-color: rgb(248, 248, 248); }
table tr th { font-weight: bold; border: 2px solid rgb(204, 204, 204); margin: 0px; padding: 6px 13px; }
table tr td { border: 2px solid rgb(204, 204, 204); margin: 0px; padding: 6px 13px; }
table tr th :first-child, table tr td :first-child { margin-top: 0px; }
table tr th :last-child, table tr td :last-child { margin-bottom: 0px; }
div.mermaid-diagram { margin: 16px 0px; overflow-y: hidden; }
div.flowchart-diagram { padding: 0px 5px; margin: 16px 0px; width: fit-content; overflow: hidden; }
div.plantuml-diagram { padding: 5px 5px 0px; margin: 16px 0px; width: fit-content; overflow: hidden; }
.img-package { text-align: center; }
img.img-center { display: block; margin-left: auto; margin-right: auto; }
div.img-caption { min-width: 20%; max-width: 80%; display: inline-block; padding: 10px; margin: 0px auto; border-bottom: 1px solid rgb(192, 192, 192); color: rgb(108, 108, 108); text-align: center; line-height: 1.5; }
.emoji_zero, .emoji_one, .emoji_two, .emoji_three, .emoji_four, .emoji_five, .emoji_six, .emoji_seven, .emoji_eight, .emoji_nine { margin-left: 5px; margin-right: 8px; }
div.preview-hint { opacity: 0.5; margin-top: 30%; margin-bottom: 30%; align-items: center; display: flex; flex-direction: column; justify-content: center; }
table.hljs-ln tr { border: none; background-color: transparent; }
table.hljs-ln tr td { border: none; background-color: transparent; }
table.hljs-ln tr td.hljs-ln-numbers { user-select: none; text-align: center; color: rgb(170, 170, 170); border-right: 1px solid rgb(204, 204, 204); vertical-align: top; padding-right: 5px; white-space: nowrap; }
table.hljs-ln tr td.hljs-ln-code { padding-left: 10px; }
::-webkit-scrollbar { background-color: rgb(234, 234, 234); width: 14px; height: 14px; border: none; }
::-webkit-scrollbar-corner { background-color: rgb(234, 234, 234); }
::-webkit-scrollbar-button { height: 14px; width: 14px; background-color: rgb(234, 234, 234); }
::-webkit-scrollbar-button:hover { background-color: rgb(208, 208, 208); }
::-webkit-scrollbar-button:active { background-color: rgb(178, 178, 178); }
::-webkit-scrollbar-track { background-color: rgb(234, 234, 234); }
::-webkit-scrollbar-thumb { border: none; background-color: rgb(218, 218, 218); }
::-webkit-scrollbar-thumb:hover { background-color: rgb(208, 208, 208); }
::-webkit-scrollbar-thumb:active { background-color: rgb(178, 178, 178); }
::-webkit-scrollbar-button:horizontal:increment { background-image: url('data:image/svg+xml;utf8,<svg width="512" height="512" xmlns="http://www.w3.org/2000/svg" xmlns:svg="http://www.w3.org/2000/svg"> <g>    <g transform="rotate(-90 256.00000000000006,256) " id="svg_1">   <polygon fill="%23333333" id="svg_2" points="128,192 256,320 384,192  "/>  </g> </g></svg>'); background-repeat: no-repeat; background-size: contain; }
::-webkit-scrollbar-button:horizontal:decrement { background-image: url('data:image/svg+xml;utf8,<svg width="512" height="512" xmlns="http://www.w3.org/2000/svg" xmlns:svg="http://www.w3.org/2000/svg"> <g>    <g transform="rotate(90 255.99999999999997,256.00000000000006) " id="svg_1">   <polygon points="128,192 256,320 384,192  " id="svg_2" fill="%23333333"/>  </g> </g></svg>'); background-repeat: no-repeat; background-size: contain; }
::-webkit-scrollbar-button:vertical:increment { background-image: url('data:image/svg+xml;utf8,<svg width="512" height="512" xmlns="http://www.w3.org/2000/svg" xmlns:svg="http://www.w3.org/2000/svg"> <g>    <g transform="null" id="svg_1">   <polygon points="128,192 256,320 384,192  " id="svg_2" fill="%23333333"/>  </g> </g></svg>'); background-repeat: no-repeat; background-size: contain; }
::-webkit-scrollbar-button:vertical:decrement { background-image: url('data:image/svg+xml;utf8,<svg width="512" height="512" xmlns="http://www.w3.org/2000/svg" xmlns:svg="http://www.w3.org/2000/svg"> <g>    <g transform="rotate(180 255.99999999999997,256) " id="svg_1">   <polygon points="128,192 256,320 384,192  " id="svg_2" fill="%23333333"/>  </g> </g></svg>'); background-repeat: no-repeat; background-size: contain; }
::selection { background: rgb(25, 118, 210); color: rgb(245, 245, 245); }
.modal-box { background-color: rgba(234, 234, 234, 0.952941); }
span.modal-close { color: rgb(102, 102, 102); }
span.modal-close:hover, span.modal-close:focus { color: rgb(34, 34, 34); }
.hljs { display: block; overflow-x: auto; padding: 0.5em; background: rgb(224, 224, 224); }
.hljs, .hljs-subst { color: rgb(54, 54, 54); }
.hljs-comment { color: rgb(118, 118, 118); }
.hljs-keyword, .hljs-attribute, .hljs-selector-tag, .hljs-meta-keyword, .hljs-doctag, .hljs-name { color: rgb(0, 0, 238); }
.hljs-type, .hljs-string, .hljs-number, .hljs-selector-id, .hljs-selector-class, .hljs-quote, .hljs-template-tag, .hljs-deletion { color: rgb(136, 0, 0); }
.hljs-title, .hljs-section { color: rgb(136, 0, 0); font-weight: bold; }
.hljs-regexp, .hljs-symbol, .hljs-variable, .hljs-template-variable, .hljs-link, .hljs-selector-attr, .hljs-selector-pseudo { color: rgb(188, 96, 96); }
.hljs-literal { color: rgb(175, 0, 215); }
.hljs-built_in, .hljs-bullet, .hljs-code, .hljs-addition { color: rgb(0, 135, 0); }
.hljs-meta { color: rgb(31, 113, 153); }
.hljs-meta-string { color: rgb(77, 153, 191); }
.hljs-emphasis { font-style: italic; }
.hljs-strong { font-weight: bold; }
.mermaid-diagram .mermaid .label { color: rgb(51, 51, 51); }
.mermaid-diagram .node rect, .mermaid-diagram .node circle, .mermaid-diagram .node ellipse, .mermaid-diagram .node polygon { fill: rgb(236, 236, 255); stroke: rgb(204, 204, 255); stroke-width: 1px; }
.mermaid-diagram .edgePath .path { stroke: rgb(51, 51, 51); }
.mermaid-diagram .edgeLabel { background-color: rgb(232, 232, 232); }
.mermaid-diagram .cluster rect { fill: rgb(255, 255, 222) !important; rx: 4 !important; stroke: rgb(170, 170, 51) !important; stroke-width: 1px !important; }
.mermaid-diagram .cluster text { fill: rgb(51, 51, 51); }
.mermaid-diagram .actor { stroke: rgb(204, 204, 255); fill: rgb(236, 236, 255); }
.mermaid-diagram text.actor { fill: black; stroke: none; }
.mermaid-diagram .actor-line { stroke: grey; }
.mermaid-diagram .messageLine0 { stroke-width: 1.5; stroke: rgb(51, 51, 51); }
.mermaid-diagram .messageLine1 { stroke-width: 1.5; stroke: rgb(51, 51, 51); }
.mermaid-diagram #arrowhead { fill: rgb(51, 51, 51); }
.mermaid-diagram #crosshead path { fill: rgb(51, 51, 51) !important; stroke: rgb(51, 51, 51) !important; }
.mermaid-diagram .messageText { fill: rgb(51, 51, 51); stroke: none; }
.mermaid-diagram .labelBox { stroke: rgb(204, 204, 255); fill: rgb(236, 236, 255); }
.mermaid-diagram .labelText { fill: black; stroke: none; }
.mermaid-diagram .loopText { fill: black; stroke: none; }
.mermaid-diagram .loopLine { stroke-width: 2; stroke: rgb(204, 204, 255); }
.mermaid-diagram .note { stroke: rgb(170, 170, 51); fill: rgb(255, 245, 173); }
.mermaid-diagram .noteText { fill: black; stroke: none; font-family: "trebuchet ms", verdana, arial; font-size: 14px; }
.mermaid-diagram .section { stroke: none; opacity: 0.2; }
.mermaid-diagram .section0 { fill: rgba(102, 102, 255, 0.490196); }
.mermaid-diagram .section2 { fill: rgb(255, 244, 0); }
.mermaid-diagram .section1, .mermaid-diagram .section3 { fill: white; opacity: 0.2; }
.mermaid-diagram .sectionTitle0 { fill: rgb(51, 51, 51); }
.mermaid-diagram .sectionTitle1 { fill: rgb(51, 51, 51); }
.mermaid-diagram .sectionTitle2 { fill: rgb(51, 51, 51); }
.mermaid-diagram .sectionTitle3 { fill: rgb(51, 51, 51); }
.mermaid-diagram .sectionTitle { text-anchor: start; font-size: 11px; }
.mermaid-diagram .grid .tick { stroke: lightgrey; opacity: 0.3; shape-rendering: crispEdges; }
.mermaid-diagram .grid path { stroke-width: 0; }
.mermaid-diagram .today { fill: none; stroke: red; stroke-width: 2px; }
.mermaid-diagram .task { stroke-width: 2; }
.mermaid-diagram .taskText { text-anchor: middle; font-size: 11px; }
.mermaid-diagram .taskTextOutsideRight { fill: black; text-anchor: start; font-size: 11px; }
.mermaid-diagram .taskTextOutsideLeft { fill: black; text-anchor: end; font-size: 11px; }
.mermaid-diagram .taskText0, .mermaid-diagram .taskText1, .mermaid-diagram .taskText2, .mermaid-diagram .taskText3 { fill: white; }
.mermaid-diagram .task0, .mermaid-diagram .task1, .mermaid-diagram .task2, .mermaid-diagram .task3 { fill: rgb(138, 144, 221); stroke: rgb(83, 79, 188); }
.mermaid-diagram .taskTextOutside0, .mermaid-diagram .taskTextOutside2 { fill: black; }
.mermaid-diagram .taskTextOutside1, .mermaid-diagram .taskTextOutside3 { fill: black; }
.mermaid-diagram .active0, .mermaid-diagram .active1, .mermaid-diagram .active2, .mermaid-diagram .active3 { fill: rgb(191, 199, 255); stroke: rgb(83, 79, 188); }
.mermaid-diagram .activeText0, .mermaid-diagram .activeText1, .mermaid-diagram .activeText2, .mermaid-diagram .activeText3 { fill: black !important; }
.mermaid-diagram .done0, .mermaid-diagram .done1, .mermaid-diagram .done2, .mermaid-diagram .done3 { stroke: grey; fill: lightgrey; stroke-width: 2; }
.mermaid-diagram .doneText0, .mermaid-diagram .doneText1, .mermaid-diagram .doneText2, .mermaid-diagram .doneText3 { fill: black !important; }
.mermaid-diagram .crit0, .mermaid-diagram .crit1, .mermaid-diagram .crit2, .mermaid-diagram .crit3 { stroke: rgb(255, 136, 136); fill: red; stroke-width: 2; }
.mermaid-diagram .activeCrit0, .mermaid-diagram .activeCrit1, .mermaid-diagram .activeCrit2, .mermaid-diagram .activeCrit3 { stroke: rgb(255, 136, 136); fill: rgb(191, 199, 255); stroke-width: 2; }
.mermaid-diagram .doneCrit0, .mermaid-diagram .doneCrit1, .mermaid-diagram .doneCrit2, .mermaid-diagram .doneCrit3 { stroke: rgb(255, 136, 136); fill: lightgrey; stroke-width: 2; cursor: pointer; shape-rendering: crispEdges; }
.mermaid-diagram .doneCritText0, .mermaid-diagram .doneCritText1, .mermaid-diagram .doneCritText2, .mermaid-diagram .doneCritText3 { fill: black !important; }
.mermaid-diagram .activeCritText0, .mermaid-diagram .activeCritText1, .mermaid-diagram .activeCritText2, .mermaid-diagram .activeCritText3 { fill: black !important; }
.mermaid-diagram .titleText { text-anchor: middle; font-size: 18px; fill: black; }
.mermaid-diagram .node text { font-family: "trebuchet ms", verdana, arial; font-size: 14px; }
.mermaid-diagram div.mermaidTooltip { position: absolute; text-align: center; max-width: 200px; padding: 2px; font-family: "trebuchet ms", verdana, arial; font-size: 12px; background: rgb(255, 255, 222); border: 1px solid rgb(170, 170, 51); border-radius: 2px; pointer-events: none; z-index: 100; }
.hljs-ln { border-collapse: collapse; }
.hljs-ln td { padding: 0px; }
.hljs-ln-n::before { content: attr(data-line-number); }
.MathJax_Hover_Frame { border-radius: 0.25em; box-shadow: rgb(136, 51, 170) 0px 0px 15px; display: inline-block; position: absolute; border: 1px solid rgb(170, 102, 221) !important; }
.MathJax_Menu_Button .MathJax_Hover_Arrow { position: absolute; cursor: pointer; display: inline-block; border: 2px solid rgb(170, 170, 170); border-radius: 4px; font-family: "Courier New", Courier; font-size: 9px; color: rgb(240, 240, 240); }
.MathJax_Menu_Button .MathJax_Hover_Arrow span { display: block; background-color: rgb(170, 170, 170); border: 1px solid; border-radius: 3px; line-height: 0; padding: 4px; }
.MathJax_Hover_Arrow:hover { color: white !important; border: 2px solid rgb(204, 204, 204) !important; }
.MathJax_Hover_Arrow:hover span { background-color: rgb(204, 204, 204) !important; }
#MathJax_About { position: fixed; left: 50%; width: auto; text-align: center; border: 3px outset; padding: 1em 2em; background-color: rgb(221, 221, 221); color: black; cursor: default; font-family: message-box; font-size: 120%; font-style: normal; text-indent: 0px; text-transform: none; line-height: normal; letter-spacing: normal; word-spacing: normal; word-wrap: normal; white-space: nowrap; float: none; z-index: 201; border-radius: 15px; box-shadow: rgb(128, 128, 128) 0px 10px 20px; }
#MathJax_About.MathJax_MousePost { outline: none; }
.MathJax_Menu { position: absolute; background-color: white; color: black; width: auto; padding: 2px; border: 1px solid rgb(204, 204, 204); margin: 0px; cursor: default; font-style: normal; font-weight: normal; font-size: 15px; font-family: "Microsoft YaHei UI"; font-stretch: normal; font-variant: normal; text-align: left; text-indent: 0px; text-transform: none; line-height: normal; letter-spacing: normal; word-spacing: normal; word-wrap: normal; white-space: nowrap; float: none; z-index: 201; box-shadow: rgb(128, 128, 128) 0px 10px 20px; }
.MathJax_MenuItem { padding: 2px 2em; background: transparent; }
.MathJax_MenuArrow { position: absolute; right: 0.5em; padding-top: 0.25em; color: rgb(102, 102, 102); font-size: 0.75em; }
.MathJax_MenuActive .MathJax_MenuArrow { color: white; }
.MathJax_MenuArrow.RTL { left: 0.5em; right: auto; }
.MathJax_MenuCheck { position: absolute; left: 0.7em; }
.MathJax_MenuCheck.RTL { right: 0.7em; left: auto; }
.MathJax_MenuRadioCheck { position: absolute; left: 1em; }
.MathJax_MenuRadioCheck.RTL { right: 1em; left: auto; }
.MathJax_MenuLabel { padding: 2px 2em 4px 1.33em; font-style: italic; }
.MathJax_MenuRule { border-top: 1px solid rgb(204, 204, 204); margin: 4px 1px 0px; }
.MathJax_MenuDisabled { color: graytext; }
.MathJax_MenuActive { background-color: highlight; color: highlighttext; }
.MathJax_MenuDisabled:focus, .MathJax_MenuLabel:focus { background-color: rgb(232, 232, 232); }
.MathJax_ContextMenu:focus { outline: none; }
.MathJax_ContextMenu .MathJax_MenuItem:focus { outline: none; }
#MathJax_AboutClose { top: 0.2em; right: 0.2em; }
.MathJax_Menu .MathJax_MenuClose { top: -10px; left: -10px; }
.MathJax_MenuClose { position: absolute; cursor: pointer; display: inline-block; border: 2px solid rgb(170, 170, 170); border-radius: 18px; font-family: "Courier New", Courier; font-size: 24px; color: rgb(240, 240, 240); }
.MathJax_MenuClose span { display: block; background-color: rgb(170, 170, 170); border: 1.5px solid; border-radius: 18px; line-height: 0; padding: 8px 0px 6px; }
.MathJax_MenuClose:hover { color: white !important; border: 2px solid rgb(204, 204, 204) !important; }
.MathJax_MenuClose:hover span { background-color: rgb(204, 204, 204) !important; }
.MathJax_MenuClose:hover:focus { outline: none; }
.MathJax_Preview .MJXf-math { color: inherit !important; }
.MJX_Assistive_MathML { top: 0px; left: 0px; clip: rect(1px 1px 1px 1px); user-select: none; position: absolute !important; padding: 1px 0px 0px !important; border: 0px !important; height: 1px !important; width: 1px !important; overflow: hidden !important; display: block !important; }
.MJX_Assistive_MathML.MJX_Assistive_MathML_Block { width: 100% !important; }
#MathJax_Zoom { position: absolute; background-color: rgb(240, 240, 240); overflow: auto; display: block; z-index: 301; padding: 0.5em; border: 1px solid black; margin: 0px; font-weight: normal; font-style: normal; text-align: left; text-indent: 0px; text-transform: none; line-height: normal; letter-spacing: normal; word-spacing: normal; word-wrap: normal; white-space: nowrap; float: none; box-sizing: content-box; box-shadow: rgb(170, 170, 170) 5px 5px 15px; }
#MathJax_ZoomOverlay { position: absolute; left: 0px; top: 0px; z-index: 300; display: inline-block; width: 100%; height: 100%; border: 0px; padding: 0px; margin: 0px; background-color: white; opacity: 0; }
#MathJax_ZoomFrame { position: relative; display: inline-block; height: 0px; width: 0px; }
#MathJax_ZoomEventTrap { position: absolute; left: 0px; top: 0px; z-index: 302; display: inline-block; border: 0px; padding: 0px; margin: 0px; background-color: white; opacity: 0; }
.MathJax_Preview { color: rgb(136, 136, 136); }
#MathJax_Message { position: fixed; left: 1px; bottom: 2px; background-color: rgb(230, 230, 230); border: 1px solid rgb(149, 149, 149); margin: 0px; padding: 2px 8px; z-index: 102; color: black; font-size: 80%; width: auto; white-space: nowrap; }
#MathJax_MSIE_Frame { position: absolute; top: 0px; left: 0px; width: 0px; z-index: 101; border: 0px; margin: 0px; padding: 0px; }
.MathJax_Error { color: rgb(204, 0, 0); font-style: italic; }
.MJXp-script { font-size: 0.8em; }
.MJXp-right { transform-origin: right center 0px; }
.MJXp-bold { font-weight: bold; }
.MJXp-italic { font-style: italic; }
.MJXp-scr { font-family: MathJax_Script, "Times New Roman", Times, STIXGeneral, serif; }
.MJXp-frak { font-family: MathJax_Fraktur, "Times New Roman", Times, STIXGeneral, serif; }
.MJXp-sf { font-family: MathJax_SansSerif, "Times New Roman", Times, STIXGeneral, serif; }
.MJXp-cal { font-family: MathJax_Caligraphic, "Times New Roman", Times, STIXGeneral, serif; }
.MJXp-mono { font-family: MathJax_Typewriter, "Times New Roman", Times, STIXGeneral, serif; }
.MJXp-largeop { font-size: 150%; }
.MJXp-largeop.MJXp-int { vertical-align: -0.2em; }
.MJXp-math { display: inline-block; line-height: 1.2; text-indent: 0px; font-family: "Times New Roman", Times, STIXGeneral, serif; white-space: nowrap; border-collapse: collapse; }
.MJXp-display { display: block; text-align: center; margin: 1em 0px; }
.MJXp-math span { display: inline-block; }
.MJXp-box { text-align: center; display: block !important; }
.MJXp-box::after { content: " "; }
.MJXp-rule { margin-top: 0.1em; display: block !important; }
.MJXp-char { display: block !important; }
.MJXp-mo { margin: 0px 0.15em; }
.MJXp-mfrac { margin: 0px 0.125em; vertical-align: 0.25em; }
.MJXp-denom { width: 100%; display: inline-table !important; }
.MJXp-denom > * { display: table-row !important; }
.MJXp-surd { vertical-align: top; }
.MJXp-surd > * { display: block !important; }
.MJXp-script-box > * { height: 50%; display: table !important; }
.MJXp-script-box > * > * { vertical-align: top; display: table-cell !important; }
.MJXp-script-box > :last-child > * { vertical-align: bottom; }
.MJXp-script-box > * > * > * { display: block !important; }
.MJXp-mphantom { visibility: hidden; }
.MJXp-munderover { display: inline-table !important; }
.MJXp-over { text-align: center; display: inline-block !important; }
.MJXp-over > * { display: block !important; }
.MJXp-munderover > * { display: table-row !important; }
.MJXp-mtable { vertical-align: 0.25em; margin: 0px 0.125em; }
.MJXp-mtable > * { vertical-align: middle; display: inline-table !important; }
.MJXp-mtr { display: table-row !important; }
.MJXp-mtd { text-align: center; padding: 0.5em 0px 0px 0.5em; display: table-cell !important; }
.MJXp-mtr > .MJXp-mtd:first-child { padding-left: 0px; }
.MJXp-mtr:first-child > .MJXp-mtd { padding-top: 0px; }
.MJXp-mlabeledtr { display: table-row !important; }
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    <h3 id="toc_0"><a name="toc_0" class="vnote-anchor" href="#"></a>特殊行列式的计算</h3>
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class=&quot;MJX-TeXAtom-ORD&quot;><mi>n</mi><mo>&amp;#x2212;</mo><mn>1</mn></mrow></msub><mo>&amp;#x2212;</mo><mi>x</mi></mtd><mtd><mn>0</mn></mtd><mtd><mo>&amp;#x22EF;</mo></mtd><mtd><mi>x</mi></mtd></mtr><mtr><mtd><mi>y</mi><mo>&amp;#x2212;</mo><mi>x</mi></mtd><mtd><mi>y</mi><mo>&amp;#x2212;</mo><mi>x</mi></mtd><mtd><msub><mi>a</mi><mrow class=&quot;MJX-TeXAtom-ORD&quot;><mi>n</mi><mo>&amp;#x2212;</mo><mn>2</mn></mrow></msub><mo>&amp;#x2212;</mo><mi>x</mi></mtd><mtd><mo>&amp;#x22EF;</mo></mtd><mtd><mi>x</mi></mtd></mtr><mtr><mtd><mo>&amp;#x22EE;</mo></mtd><mtd><mo>&amp;#x22EE;</mo></mtd><mtd><mo>&amp;#x22EE;</mo></mtd><mtd><mo>&amp;#x22F1;</mo></mtd><mtd><mo>&amp;#x22EE;</mo></mtd></mtr><mtr><mtd><mn>0</mn></mtd><mtd><mn>0</mn></mtd><mtd><mn>0</mn></mtd><mtd><mo>&amp;#x22EF;</mo></mtd><mtd><mi>y</mi></mtd></mtr></mtable><mo>|</mo></mrow><mo>+</mo><mo stretchy=&quot;false&quot;>(</mo><msub><mi>a</mi><mn>1</mn></msub><mo>&amp;#x2212;</mo><mi>y</mi><mo stretchy=&quot;false&quot;>)</mo><msub><mi>D</mi><mrow class=&quot;MJX-TeXAtom-ORD&quot;><mi>n</mi><mo>&amp;#x2212;</mo><mn>1</mn></mrow></msub></mtd></mtr><mlabeledtr><mtd id=&quot;mjx-eqn-1&quot;><mtext>(1)</mtext></mtd><mtd /><mtd><mi></mi><mo>=</mo><mi>y</mi><mo stretchy=&quot;false&quot;>(</mo><msub><mi>a</mi><mn>2</mn></msub><mo>&amp;#x2212;</mo><mi>x</mi><mo stretchy=&quot;false&quot;>)</mo><mo stretchy=&quot;false&quot;>(</mo><msub><mi>a</mi><mn>3</mn></msub><mo>&amp;#x2212;</mo><mi>x</mi><mo stretchy=&quot;false&quot;>)</mo><mo>&amp;#x22EF;</mo><mo stretchy=&quot;false&quot;>(</mo><msub><mi>a</mi><mi>n</mi></msub><mo>&amp;#x2212;</mo><mi>x</mi><mo stretchy=&quot;false&quot;>)</mo><mo>+</mo><mo stretchy=&quot;false&quot;>(</mo><msub><mi>a</mi><mn>1</mn></msub><mo>&amp;#x2212;</mo><mi>y</mi><mo stretchy=&quot;false&quot;>)</mo><msub><mi>D</mi><mrow class=&quot;MJX-TeXAtom-ORD&quot;><mi>n</mi><mo>&amp;#x2212;</mo><mn>1</mn></mrow></msub></mtd></mlabeledtr><mtr><mtd><mrow class=&quot;MJX-TeXAtom-ORD&quot;><mo>&amp;#x540C;</mo></mrow><mrow class=&quot;MJX-TeXAtom-ORD&quot;><mo>&amp;#x7406;</mo></mrow><mrow class=&quot;MJX-TeXAtom-ORD&quot;><mo>&amp;#x53EF;</mo></mrow><mrow class=&quot;MJX-TeXAtom-ORD&quot;><mo>&amp;#x5F97;</mo></mrow></mtd></mtr><mlabeledtr><mtd id=&quot;mjx-eqn-2&quot;><mtext>(2)</mtext></mtd><mtd><msub><mi>D</mi><mi>n</mi></msub></mtd><mtd><mi></mi><mo>=</mo><mi>x</mi><mo stretchy=&quot;false&quot;>(</mo><msub><mi>a</mi><mn>2</mn></msub><mo>&amp;#x2212;</mo><mi>y</mi><mo stretchy=&quot;false&quot;>)</mo><mo stretchy=&quot;false&quot;>(</mo><msub><mi>a</mi><mn>3</mn></msub><mo>&amp;#x2212;</mo><mi>y</mi><mo stretchy=&quot;false&quot;>)</mo><mo>&amp;#x22EF;</mo><mo stretchy=&quot;false&quot;>(</mo><msub><mi>a</mi><mi>n</mi></msub><mo>&amp;#x2212;</mo><mi>y</mi><mo stretchy=&quot;false&quot;>)</mo><mo>+</mo><mo stretchy=&quot;false&quot;>(</mo><msub><mi>a</mi><mn>1</mn></msub><mo>&amp;#x2212;</mo><mi>x</mi><mo stretchy=&quot;false&quot;>)</mo><msub><mi>D</mi><mrow class=&quot;MJX-TeXAtom-ORD&quot;><mi>n</mi><mo>&amp;#x2212;</mo><mn>1</mn></mrow></msub></mtd></mlabeledtr><mtr><mtd><mo stretchy=&quot;false&quot;>(</mo><mn>1</mn><mo stretchy=&quot;false&quot;>)</mo><mo>&amp;#x00D7;</mo></mtd><mtd><mi></mi><mo stretchy=&quot;false&quot;>(</mo><msub><mi>a</mi><mn>1</mn></msub><mo>&amp;#x2212;</mo><mi>x</mi><mo stretchy=&quot;false&quot;>)</mo><mo>&amp;#x2212;</mo><mo stretchy=&quot;false&quot;>(</mo><mn>2</mn><mo stretchy=&quot;false&quot;>)</mo><mo>&amp;#x00D7;</mo><mo stretchy=&quot;false&quot;>(</mo><msub><mi>a</mi><mn>1</mn></msub><mo>&amp;#x2212;</mo><mi>y</mi><mo stretchy=&quot;false&quot;>)</mo><mrow class=&quot;MJX-TeXAtom-ORD&quot;><mo>&amp;#x5F97;</mo></mrow></mtd></mtr><mtr><mtd /><mtd><mi></mi><mo stretchy=&quot;false&quot;>(</mo><mi>y</mi><mo>&amp;#x2212;</mo><mi>x</mi><mo stretchy=&quot;false&quot;>)</mo><msub><mi>D</mi><mi>n</mi></msub><mo>=</mo><mi>y</mi><munderover><mo>&amp;#x220F;</mo><mrow class=&quot;MJX-TeXAtom-ORD&quot;><mi>i</mi><mo>=</mo><mn>1</mn></mrow><mi>n</mi></munderover><mo stretchy=&quot;false&quot;>(</mo><msub><mi>a</mi><mi>i</mi></msub><mo>&amp;#x2212;</mo><mi>x</mi><mo stretchy=&quot;false&quot;>)</mo><mo>&amp;#x2212;</mo><mi>x</mi><munderover><mo>&amp;#x220F;</mo><mrow class=&quot;MJX-TeXAtom-ORD&quot;><mi>i</mi><mo>=</mo><mn>1</mn></mrow><mi>n</mi></munderover><mo stretchy=&quot;false&quot;>(</mo><msub><mi>a</mi><mi>i</mi></msub><mo>&amp;#x2212;</mo><mi>y</mi><mo stretchy=&quot;false&quot;>)</mo></mtd></mtr><mtr><mtd><mrow class=&quot;MJX-TeXAtom-ORD&quot;><mo>&amp;#x6545;</mo></mrow></mtd><mtd><msub><mi>D</mi><mi>n</mi></msub><mo>=</mo><mfrac><mn>1</mn><mrow><mi>y</mi><mo>&amp;#x2212;</mo><mi>x</mi></mrow></mfrac><mrow><mo>[</mo><mrow><mi>y</mi><munderover><mo>&amp;#x220F;</mo><mrow class=&quot;MJX-TeXAtom-ORD&quot;><mi>i</mi><mo>=</mo><mn>1</mn></mrow><mi>n</mi></munderover><mo stretchy=&quot;false&quot;>(</mo><msub><mi>a</mi><mi>i</mi></msub><mo>&amp;#x2212;</mo><mi>x</mi><mo stretchy=&quot;false&quot;>)</mo><mo>&amp;#x2212;</mo><mi>x</mi><munderover><mo>&amp;#x220F;</mo><mrow class=&quot;MJX-TeXAtom-ORD&quot;><mi>i</mi><mo>=</mo><mn>1</mn></mrow><mi>n</mi></munderover><mo stretchy=&quot;false&quot;>(</mo><msub><mi>a</mi><mi>i</mi></msub><mo>&amp;#x2212;</mo><mi>y</mi><mo stretchy=&quot;false&quot;>)</mo></mrow><mo>]</mo></mrow></mtd></mtr></mtable></math>" role="presentation" style="position: relative;"><nobr aria-hidden="true"><span class="math" id="MathJax-Span-1" style="width: 100%; display: inline-block; min-width: 35.262em;"><span style="display: inline-block; position: relative; width: 100%; height: 0px; font-size: 126%; min-width: 35.262em;"><span style="position: absolute; clip: rect(49.502em 1030.99em 102.373em -1000em); top: -53.571em; left: 0em; width: 100%;"><span class="mrow" id="MathJax-Span-2"><span style="display: inline-block; position: relative; width: 100%; height: 0px; min-width: 35.262em;"><span style="position: absolute; clip: rect(4.264em 1015.06em 11.903em -1000em); top: -8.333em; left: 50%; margin-left: -7.591em;"><span class="texatom" id="MathJax-Span-3"><span class="mrow" id="MathJax-Span-4"><span class="mo" id="MathJax-Span-5"><span style="font-family: STIXGeneral, &quot;Arial Unicode MS&quot;, serif; font-size: 79%; font-style: normal; font-weight: normal;">设</span></span></span></span><span class="msubsup" id="MathJax-Span-6"><span style="display: inline-block; position: relative; width: 1.327em; height: 0px;"><span style="position: absolute; clip: rect(3.186em 1000.8em 4.167em -1000em); top: -4.018em; left: 0em;"><span class="mi" id="MathJax-Span-7" style="font-family: MathJax_Math-italic;">D</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; top: -3.868em; left: 0.828em;"><span class="mi" id="MathJax-Span-8" style="font-size: 70.7%; font-family: MathJax_Math-italic;">n</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span><span class="mo" id="MathJax-Span-9" style="font-family: MathJax_Main; padding-left: 0.278em;">=</span><span class="mrow" id="MathJax-Span-10" style="padding-left: 0.278em;"><span class="mo" id="MathJax-Span-11" style="vertical-align: 3.92em;"><span style="display: inline-block; position: relative; width: 0.278em; height: 0px;"><span style="position: absolute; font-family: MathJax_Main; top: -3.268em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; font-family: MathJax_Main; top: 3.074em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: -2.362em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: -1.456em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: -0.55em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: 0.356em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: 1.262em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: 2.168em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span><span class="mtable" id="MathJax-Span-12" style="padding-right: 0.167em; padding-left: 0.167em;"><span style="display: inline-block; position: relative; width: 11.132em; height: 0px;"><span style="position: absolute; clip: rect(4.276em 1001.03em 11.555em -1000em); top: -7.986em; left: 0em;"><span style="display: inline-block; position: relative; width: 1.028em; height: 0px;"><span style="position: absolute; clip: rect(3.428em 1001.03em 4.324em -1000em); top: -7.138em; left: 50%; margin-left: -0.514em;"><span class="mtd" id="MathJax-Span-13"><span class="mrow" id="MathJax-Span-14"><span class="msubsup" id="MathJax-Span-15"><span style="display: inline-block; position: relative; width: 1.028em; height: 0px;"><span style="position: absolute; clip: rect(3.428em 1000.51em 4.177em -1000em); top: -4.018em; left: 0em;"><span class="mi" id="MathJax-Span-16" style="font-family: MathJax_Math-italic;">a</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; top: -3.868em; left: 0.529em;"><span class="mi" id="MathJax-Span-17" style="font-size: 70.7%; font-family: MathJax_Math-italic;">n</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.427em 1000.5em 4.372em -1000em); top: -5.738em; left: 50%; margin-left: -0.248em;"><span class="mtd" id="MathJax-Span-30"><span class="mrow" id="MathJax-Span-31"><span class="mi" id="MathJax-Span-32" style="font-family: MathJax_Math-italic;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.427em 1000.5em 4.372em -1000em); top: -4.33em; left: 50%; margin-left: -0.248em;"><span class="mtd" id="MathJax-Span-51"><span class="mrow" id="MathJax-Span-52"><span class="mi" id="MathJax-Span-53" style="font-family: MathJax_Math-italic;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(2.569em 1000.2em 4.197em -1000em); top: -2.202em; left: 50%; margin-left: -0.139em;"><span class="mtd" id="MathJax-Span-72"><span class="mrow" id="MathJax-Span-73"><span class="mo" id="MathJax-Span-74" style="font-family: MathJax_Main;">⋮</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.427em 1000.5em 4.372em -1000em); top: -0.802em; left: 50%; margin-left: -0.248em;"><span class="mtd" id="MathJax-Span-87"><span class="mrow" id="MathJax-Span-88"><span class="mi" id="MathJax-Span-89" style="font-family: MathJax_Math-italic;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span><span style="display: inline-block; width: 0px; height: 7.986em;"></span></span><span style="position: absolute; clip: rect(4.275em 1001.93em 11.555em -1000em); top: -7.986em; left: 2.028em;"><span style="display: inline-block; position: relative; width: 1.932em; height: 0px;"><span style="position: absolute; clip: rect(3.427em 1000.52em 4.178em -1000em); top: -7.138em; left: 50%; margin-left: -0.286em;"><span class="mtd" id="MathJax-Span-18"><span class="mrow" id="MathJax-Span-19"><span class="mi" id="MathJax-Span-20" style="font-family: MathJax_Math-italic;">x</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.428em 1001.93em 4.375em -1000em); top: -5.738em; left: 50%; margin-left: -0.966em;"><span class="mtd" id="MathJax-Span-33"><span class="mrow" id="MathJax-Span-34"><span class="msubsup" id="MathJax-Span-35"><span style="display: inline-block; position: relative; width: 1.932em; height: 0px;"><span style="position: absolute; clip: rect(3.428em 1000.51em 4.177em -1000em); top: -4.018em; left: 0em;"><span class="mi" id="MathJax-Span-36" style="font-family: MathJax_Math-italic;">a</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; top: -3.868em; left: 0.529em;"><span class="texatom" id="MathJax-Span-37"><span class="mrow" id="MathJax-Span-38"><span class="mi" id="MathJax-Span-39" style="font-size: 70.7%; font-family: MathJax_Math-italic;">n</span><span class="mo" id="MathJax-Span-40" style="font-size: 70.7%; font-family: MathJax_Main;">−</span><span class="mn" id="MathJax-Span-41" style="font-size: 70.7%; font-family: MathJax_Main;">1</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.427em 1000.5em 4.372em -1000em); top: -4.33em; left: 50%; margin-left: -0.248em;"><span class="mtd" id="MathJax-Span-54"><span class="mrow" id="MathJax-Span-55"><span class="mi" id="MathJax-Span-56" style="font-family: MathJax_Math-italic;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(2.569em 1000.2em 4.197em -1000em); top: -2.202em; left: 50%; margin-left: -0.139em;"><span class="mtd" id="MathJax-Span-75"><span class="mrow" id="MathJax-Span-76"><span class="mo" id="MathJax-Span-77" style="font-family: MathJax_Main;">⋮</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.427em 1000.5em 4.372em -1000em); top: -0.802em; left: 50%; margin-left: -0.248em;"><span class="mtd" id="MathJax-Span-90"><span class="mrow" id="MathJax-Span-91"><span class="mi" id="MathJax-Span-92" style="font-family: MathJax_Math-italic;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span><span style="display: inline-block; width: 0px; height: 7.986em;"></span></span><span style="position: absolute; clip: rect(4.275em 1001.93em 11.555em -1000em); top: -7.986em; left: 4.96em;"><span style="display: inline-block; position: relative; width: 1.932em; height: 0px;"><span style="position: absolute; clip: rect(3.427em 1000.52em 4.178em -1000em); top: -7.138em; left: 50%; margin-left: -0.286em;"><span class="mtd" id="MathJax-Span-21"><span class="mrow" id="MathJax-Span-22"><span class="mi" id="MathJax-Span-23" style="font-family: MathJax_Math-italic;">x</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.427em 1000.52em 4.178em -1000em); top: -5.738em; left: 50%; margin-left: -0.286em;"><span class="mtd" id="MathJax-Span-42"><span class="mrow" id="MathJax-Span-43"><span class="mi" id="MathJax-Span-44" style="font-family: MathJax_Math-italic;">x</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.428em 1001.93em 4.375em -1000em); top: -4.33em; left: 50%; margin-left: -0.966em;"><span class="mtd" id="MathJax-Span-57"><span class="mrow" id="MathJax-Span-58"><span class="msubsup" id="MathJax-Span-59"><span style="display: inline-block; position: relative; width: 1.932em; height: 0px;"><span style="position: absolute; clip: rect(3.428em 1000.51em 4.177em -1000em); top: -4.018em; left: 0em;"><span class="mi" id="MathJax-Span-60" style="font-family: MathJax_Math-italic;">a</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; top: -3.868em; left: 0.529em;"><span class="texatom" id="MathJax-Span-61"><span class="mrow" id="MathJax-Span-62"><span class="mi" id="MathJax-Span-63" style="font-size: 70.7%; font-family: MathJax_Math-italic;">n</span><span class="mo" id="MathJax-Span-64" style="font-size: 70.7%; font-family: MathJax_Main;">−</span><span class="mn" id="MathJax-Span-65" style="font-size: 70.7%; font-family: MathJax_Main;">2</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(2.569em 1000.2em 4.197em -1000em); top: -2.202em; left: 50%; margin-left: -0.139em;"><span class="mtd" id="MathJax-Span-78"><span class="mrow" id="MathJax-Span-79"><span class="mo" id="MathJax-Span-80" style="font-family: MathJax_Main;">⋮</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.427em 1000.5em 4.372em -1000em); top: -0.802em; left: 50%; margin-left: -0.248em;"><span class="mtd" id="MathJax-Span-93"><span class="mrow" id="MathJax-Span-94"><span class="mi" id="MathJax-Span-95" style="font-family: MathJax_Math-italic;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span><span style="display: inline-block; width: 0px; height: 7.986em;"></span></span><span style="position: absolute; clip: rect(3.861em 1001.15em 10.615em -1000em); top: -7.44em; left: 7.892em;"><span style="display: inline-block; position: relative; width: 1.282em; height: 0px;"><span style="position: absolute; clip: rect(3.559em 1001.09em 3.977em -1000em); top: -7.138em; left: 50%; margin-left: -0.586em;"><span class="mtd" id="MathJax-Span-24"><span class="mrow" id="MathJax-Span-25"><span class="mo" id="MathJax-Span-26" style="font-family: MathJax_Main;">⋯</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.559em 1001.09em 3.977em -1000em); top: -5.738em; left: 50%; margin-left: -0.586em;"><span class="mtd" id="MathJax-Span-45"><span class="mrow" id="MathJax-Span-46"><span class="mo" id="MathJax-Span-47" style="font-family: MathJax_Main;">⋯</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.559em 1001.09em 3.977em -1000em); top: -4.33em; left: 50%; margin-left: -0.586em;"><span class="mtd" id="MathJax-Span-66"><span class="mrow" id="MathJax-Span-67"><span class="mo" id="MathJax-Span-68" style="font-family: MathJax_Main;">⋯</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(2.349em 1001.15em 4.067em -1000em); top: -2.202em; left: 50%; margin-left: -0.641em;"><span class="mtd" id="MathJax-Span-81"><span class="mrow" id="MathJax-Span-82"><span class="mo" id="MathJax-Span-83" style="font-family: MathJax_Main;">⋱</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.559em 1001.09em 3.977em -1000em); top: -0.802em; left: 50%; margin-left: -0.586em;"><span class="mtd" id="MathJax-Span-96"><span class="mrow" id="MathJax-Span-97"><span class="mo" id="MathJax-Span-98" style="font-family: MathJax_Main;">⋯</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span><span style="display: inline-block; width: 0px; height: 7.44em;"></span></span><span style="position: absolute; clip: rect(4.225em 1000.96em 11.451em -1000em); top: -7.937em; left: 10.174em;"><span style="display: inline-block; position: relative; width: 0.958em; height: 0px;"><span style="position: absolute; clip: rect(3.427em 1000.52em 4.178em -1000em); top: -7.138em; left: 50%; margin-left: -0.286em;"><span class="mtd" id="MathJax-Span-27"><span class="mrow" id="MathJax-Span-28"><span class="mi" id="MathJax-Span-29" style="font-family: MathJax_Math-italic;">x</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.427em 1000.52em 4.178em -1000em); top: -5.738em; left: 50%; margin-left: -0.286em;"><span class="mtd" id="MathJax-Span-48"><span class="mrow" id="MathJax-Span-49"><span class="mi" id="MathJax-Span-50" style="font-family: MathJax_Math-italic;">x</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.427em 1000.52em 4.178em -1000em); top: -4.33em; left: 50%; margin-left: -0.286em;"><span class="mtd" id="MathJax-Span-69"><span class="mrow" id="MathJax-Span-70"><span class="mi" id="MathJax-Span-71" style="font-family: MathJax_Math-italic;">x</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(2.569em 1000.2em 4.197em -1000em); top: -2.202em; left: 50%; margin-left: -0.139em;"><span class="mtd" id="MathJax-Span-84"><span class="mrow" id="MathJax-Span-85"><span class="mo" id="MathJax-Span-86" style="font-family: MathJax_Main;">⋮</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.428em 1000.96em 4.317em -1000em); top: -0.802em; left: 50%; margin-left: -0.479em;"><span class="mtd" id="MathJax-Span-99"><span class="mrow" id="MathJax-Span-100"><span class="msubsup" id="MathJax-Span-101"><span style="display: inline-block; position: relative; width: 0.958em; height: 0px;"><span style="position: absolute; clip: rect(3.428em 1000.51em 4.177em -1000em); top: -4.018em; left: 0em;"><span class="mi" id="MathJax-Span-102" style="font-family: MathJax_Math-italic;">a</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; top: -3.868em; left: 0.529em;"><span class="mn" id="MathJax-Span-103" style="font-size: 70.7%; font-family: MathJax_Main;">1</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span><span style="display: inline-block; width: 0px; height: 7.937em;"></span></span></span></span><span class="mo" id="MathJax-Span-104" style="vertical-align: 3.92em;"><span style="display: inline-block; position: relative; width: 0.278em; height: 0px;"><span style="position: absolute; font-family: MathJax_Main; top: -3.268em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; font-family: MathJax_Main; top: 3.074em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: -2.362em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: -1.456em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: -0.55em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: 0.356em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: 1.262em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: 2.168em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span></span><span style="display: inline-block; width: 0px; height: 8.333em;"></span></span><span style="position: absolute; clip: rect(3.069em 1008.63em 4.417em -1000em); top: 0.633em; left: 50%; margin-left: -4.313em;"><span class="mspace" id="MathJax-Span-105" style="height: 0em; vertical-align: 0em; width: 0em; display: inline-block; overflow: hidden;"></span><span class="texatom" id="MathJax-Span-106" style=""><span class="mrow" id="MathJax-Span-107"><span class="mo" id="MathJax-Span-108"><span style="font-family: STIXGeneral, &quot;Arial Unicode MS&quot;, serif; font-size: 79%; font-style: normal; font-weight: normal;">当</span></span></span></span><span class="mi" id="MathJax-Span-109" style="font-family: MathJax_Math-italic;">x</span><span class="mo" id="MathJax-Span-110" style="font-family: MathJax_Main; padding-left: 0.278em;">≠</span><span class="mi" id="MathJax-Span-111" style="font-family: MathJax_Math-italic; padding-left: 0.278em;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span><span class="texatom" id="MathJax-Span-112"><span class="mrow" id="MathJax-Span-113"><span class="mo" id="MathJax-Span-114"><span style="font-family: STIXGeneral, &quot;Arial Unicode MS&quot;, serif; font-size: 79%; font-style: normal; font-weight: normal;">时</span></span></span></span><span class="texatom" id="MathJax-Span-115"><span class="mrow" id="MathJax-Span-116"><span class="mo" id="MathJax-Span-117"><span style="font-family: STIXGeneral, &quot;Arial Unicode MS&quot;, serif; font-size: 79%; font-style: normal; font-weight: normal;">，</span></span></span></span><span class="texatom" id="MathJax-Span-118"><span class="mrow" id="MathJax-Span-119"><span class="mo" id="MathJax-Span-120"><span style="font-family: STIXGeneral, &quot;Arial Unicode MS&quot;, serif; font-size: 79%; font-style: normal; font-weight: normal;">利</span></span></span></span><span class="texatom" id="MathJax-Span-121"><span class="mrow" id="MathJax-Span-122"><span class="mo" id="MathJax-Span-123"><span style="font-family: STIXGeneral, &quot;Arial Unicode MS&quot;, serif; font-size: 79%; font-style: normal; font-weight: normal;">用</span></span></span></span><span class="texatom" id="MathJax-Span-124"><span class="mrow" id="MathJax-Span-125"><span class="mo" id="MathJax-Span-126"><span style="font-family: STIXGeneral, &quot;Arial Unicode MS&quot;, serif; font-size: 79%; font-style: normal; font-weight: normal;">拆</span></span></span></span><span class="mo" id="MathJax-Span-127" style="font-family: MathJax_Main;">(</span><span class="texatom" id="MathJax-Span-128"><span class="mrow" id="MathJax-Span-129"><span class="mo" id="MathJax-Span-130"><span style="font-family: STIXGeneral, &quot;Arial Unicode MS&quot;, serif; font-size: 79%; font-style: normal; font-weight: normal;">行</span></span></span></span><span class="mo" id="MathJax-Span-131" style="font-family: MathJax_Main;">)</span><span class="texatom" id="MathJax-Span-132"><span class="mrow" id="MathJax-Span-133"><span class="mo" id="MathJax-Span-134"><span style="font-family: STIXGeneral, &quot;Arial Unicode MS&quot;, serif; font-size: 79%; font-style: normal; font-weight: normal;">列</span></span></span></span><span class="texatom" id="MathJax-Span-135"><span class="mrow" id="MathJax-Span-136"><span class="mo" id="MathJax-Span-137"><span style="font-family: STIXGeneral, &quot;Arial Unicode MS&quot;, serif; font-size: 79%; font-style: normal; font-weight: normal;">法</span></span></span></span><span class="mo" id="MathJax-Span-138" style="font-family: MathJax_Main;">,</span><span class="texatom" id="MathJax-Span-139" style="padding-left: 0.167em;"><span class="mrow" id="MathJax-Span-140"><span class="mo" id="MathJax-Span-141"><span style="font-family: STIXGeneral, &quot;Arial Unicode MS&quot;, serif; font-size: 79%; font-style: normal; font-weight: normal;">即</span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(22.286em 1030.99em 65.904em -1000em); top: -17.103em; left: 0%; width: 100%;"><span class="mspace" id="MathJax-Span-142" style="height: 0em; vertical-align: 0em; width: 0em; display: inline-block; overflow: hidden;"></span><span class="mtable" id="MathJax-Span-143" style="min-width: 35.262em;"><span style="display: inline-block; position: relative; width: 100%; height: 0px; min-width: 35.262em;"><span style="display: inline-block; position: absolute; width: 31.106em; height: 0px; clip: rect(-22.059em 1030.99em 21.559em -1000em); top: 0em; left: 50%; margin-left: -15.553em;"><span style="position: absolute; clip: rect(21.208em 1003.17em 60.539em -1000em); top: -40.03em; left: 0em;"><span style="display: inline-block; position: relative; width: 3.175em; height: 0px;"><span style="position: absolute; clip: rect(3.186em 1001.33em 4.324em -1000em); top: -22.008em; right: 0em;"><span class="mtd" id="MathJax-Span-144"><span class="mrow" id="MathJax-Span-145"><span class="msubsup" id="MathJax-Span-146"><span style="display: inline-block; position: relative; width: 1.327em; height: 0px;"><span style="position: absolute; clip: rect(3.186em 1000.8em 4.167em -1000em); top: -4.018em; left: 0em;"><span class="mi" id="MathJax-Span-147" style="font-family: MathJax_Math-italic;">D</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; top: -3.868em; left: 0.828em;"><span class="mi" id="MathJax-Span-148" style="font-size: 70.7%; font-family: MathJax_Math-italic;">n</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.869em 1000em 4.167em -1000em); top: -14.367em; right: 0em;"><span class="mtd" id="MathJax-Span-248"><span class="mrow" id="MathJax-Span-249"></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.869em 1000em 4.167em -1000em); top: -6.726em; right: 0em;"><span class="mtd" id="MathJax-Span-359"><span class="mrow" id="MathJax-Span-360"></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.869em 1000em 4.167em -1000em); top: -2.205em; right: 0em;"><span class="mtd" id="MathJax-Span-556"><span class="mrow" id="MathJax-Span-557"></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.869em 1000em 4.167em -1000em); top: 2.265em; right: 0em;"><span class="mtd" id="MathJax-Span-647"><span class="mrow" id="MathJax-Span-648"></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.869em 1000em 4.167em -1000em); top: 6.786em; right: 0em;"><span class="mtd" id="MathJax-Span-776"><span class="mrow" id="MathJax-Span-777"></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(1.234em 1003.17em 2.531em -1000em); top: 9.971em; right: 0em;"><span class="mtd" id="MathJax-Span-820"><span class="mrow" id="MathJax-Span-821"><span class="texatom" id="MathJax-Span-822"><span class="mrow" id="MathJax-Span-823"><span class="mo" id="MathJax-Span-824"><span style="font-family: STIXGeneral, &quot;Arial Unicode MS&quot;, serif; font-size: 79%; font-style: normal; font-weight: normal;">同</span></span></span></span><span class="texatom" id="MathJax-Span-825"><span class="mrow" id="MathJax-Span-826"><span class="mo" id="MathJax-Span-827"><span style="font-family: STIXGeneral, &quot;Arial Unicode MS&quot;, serif; font-size: 79%; font-style: normal; font-weight: normal;">理</span></span></span></span><span class="texatom" id="MathJax-Span-828"><span class="mrow" id="MathJax-Span-829"><span class="mo" id="MathJax-Span-830"><span style="font-family: STIXGeneral, &quot;Arial Unicode MS&quot;, serif; font-size: 79%; font-style: normal; font-weight: normal;">可</span></span></span></span><span class="texatom" id="MathJax-Span-831"><span class="mrow" id="MathJax-Span-832"><span class="mo" id="MathJax-Span-833"><span style="font-family: STIXGeneral, &quot;Arial Unicode MS&quot;, serif; font-size: 79%; font-style: normal; font-weight: normal;">得</span></span></span></span></span></span><span style="display: inline-block; width: 0px; height: 2.183em;"></span></span><span style="position: absolute; clip: rect(3.186em 1001.33em 4.324em -1000em); top: 9.436em; right: 0em;"><span class="mtd" id="MathJax-Span-837"><span class="mrow" id="MathJax-Span-838"><span class="msubsup" id="MathJax-Span-839"><span style="display: inline-block; position: relative; width: 1.327em; height: 0px;"><span style="position: absolute; clip: rect(3.186em 1000.8em 4.167em -1000em); top: -4.018em; left: 0em;"><span class="mi" id="MathJax-Span-840" style="font-family: MathJax_Math-italic;">D</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; top: -3.868em; left: 0.828em;"><span class="mi" id="MathJax-Span-841" style="font-size: 70.7%; font-family: MathJax_Math-italic;">n</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.119em 1001.91em 4.417em -1000em); top: 10.786em; right: 0em;"><span class="mtd" id="MathJax-Span-884"><span class="mrow" id="MathJax-Span-885"><span class="mo" id="MathJax-Span-886" style="font-family: MathJax_Main;">(</span><span class="mn" id="MathJax-Span-887" style="font-family: MathJax_Main;">1</span><span class="mo" id="MathJax-Span-888" style="font-family: MathJax_Main;">)</span><span class="mo" id="MathJax-Span-889" style="font-family: MathJax_Main;">×</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.869em 1000em 4.167em -1000em); top: 12.898em; right: 0em;"><span class="mtd" id="MathJax-Span-915"><span class="mrow" id="MathJax-Span-916"></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(1.234em 1000.79em 2.531em -1000em); top: 17.978em; right: 0em;"><span class="mtd" id="MathJax-Span-962"><span class="mrow" id="MathJax-Span-963"><span class="texatom" id="MathJax-Span-964"><span class="mrow" id="MathJax-Span-965"><span class="mo" id="MathJax-Span-966"><span style="font-family: STIXGeneral, &quot;Arial Unicode MS&quot;, serif; font-size: 79%; font-style: normal; font-weight: normal;">故</span></span></span></span></span></span><span style="display: inline-block; width: 0px; height: 2.183em;"></span></span></span><span style="display: inline-block; width: 0px; height: 40.03em;"></span></span><span style="position: absolute; clip: rect(22.286em 1027.81em 65.904em -1000em); top: -44.345em; left: 3.175em;"><span style="display: inline-block; position: relative; width: 27.932em; height: 0px;"><span style="position: absolute; clip: rect(4.264em 1013.24em 11.903em -1000em); top: -26.323em; left: 0em;"><span class="mtd" id="MathJax-Span-149"><span class="mrow" id="MathJax-Span-150"><span class="mi" id="MathJax-Span-151"></span><span class="mo" id="MathJax-Span-152" style="font-family: MathJax_Main; padding-left: 0.278em;">=</span><span class="mrow" id="MathJax-Span-153" style="padding-left: 0.278em;"><span class="mo" id="MathJax-Span-154" style="vertical-align: 3.92em;"><span style="display: inline-block; position: relative; width: 0.278em; height: 0px;"><span style="position: absolute; font-family: MathJax_Main; top: -3.268em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; font-family: MathJax_Main; top: 3.074em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: -2.362em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: -1.456em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: -0.55em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: 0.356em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: 1.262em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: 2.168em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span><span class="mtable" id="MathJax-Span-155" style="padding-right: 0.167em; padding-left: 0.167em;"><span style="display: inline-block; position: relative; width: 11.132em; height: 0px;"><span style="position: absolute; clip: rect(4.276em 1001.03em 11.555em -1000em); top: -7.986em; left: 0em;"><span style="display: inline-block; position: relative; width: 1.028em; height: 0px;"><span style="position: absolute; clip: rect(3.428em 1001.03em 4.324em -1000em); top: -7.138em; left: 50%; margin-left: -0.514em;"><span class="mtd" id="MathJax-Span-156"><span class="mrow" id="MathJax-Span-157"><span class="msubsup" id="MathJax-Span-158"><span style="display: inline-block; position: relative; width: 1.028em; height: 0px;"><span style="position: absolute; clip: rect(3.428em 1000.51em 4.177em -1000em); top: -4.018em; left: 0em;"><span class="mi" id="MathJax-Span-159" style="font-family: MathJax_Math-italic;">a</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; top: -3.868em; left: 0.529em;"><span class="mi" id="MathJax-Span-160" style="font-size: 70.7%; font-family: MathJax_Math-italic;">n</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.427em 1000.5em 4.372em -1000em); top: -5.738em; left: 50%; margin-left: -0.248em;"><span class="mtd" id="MathJax-Span-173"><span class="mrow" id="MathJax-Span-174"><span class="mi" id="MathJax-Span-175" style="font-family: MathJax_Math-italic;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.427em 1000.5em 4.372em -1000em); top: -4.33em; left: 50%; margin-left: -0.248em;"><span class="mtd" id="MathJax-Span-194"><span class="mrow" id="MathJax-Span-195"><span class="mi" id="MathJax-Span-196" style="font-family: MathJax_Math-italic;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(2.569em 1000.2em 4.197em -1000em); top: -2.202em; left: 50%; margin-left: -0.139em;"><span class="mtd" id="MathJax-Span-215"><span class="mrow" id="MathJax-Span-216"><span class="mo" id="MathJax-Span-217" style="font-family: MathJax_Main;">⋮</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.427em 1000.5em 4.372em -1000em); top: -0.802em; left: 50%; margin-left: -0.248em;"><span class="mtd" id="MathJax-Span-230"><span class="mrow" id="MathJax-Span-231"><span class="mi" id="MathJax-Span-232" style="font-family: MathJax_Math-italic;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span><span style="display: inline-block; width: 0px; height: 7.986em;"></span></span><span style="position: absolute; clip: rect(4.275em 1001.93em 11.555em -1000em); top: -7.986em; left: 2.028em;"><span style="display: inline-block; position: relative; width: 1.932em; height: 0px;"><span style="position: absolute; clip: rect(3.427em 1000.52em 4.178em -1000em); top: -7.138em; left: 50%; margin-left: -0.286em;"><span class="mtd" id="MathJax-Span-161"><span class="mrow" id="MathJax-Span-162"><span class="mi" id="MathJax-Span-163" style="font-family: MathJax_Math-italic;">x</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.428em 1001.93em 4.375em -1000em); top: -5.738em; left: 50%; margin-left: -0.966em;"><span class="mtd" id="MathJax-Span-176"><span class="mrow" id="MathJax-Span-177"><span class="msubsup" id="MathJax-Span-178"><span style="display: inline-block; position: relative; width: 1.932em; height: 0px;"><span style="position: absolute; clip: rect(3.428em 1000.51em 4.177em -1000em); top: -4.018em; left: 0em;"><span class="mi" id="MathJax-Span-179" style="font-family: MathJax_Math-italic;">a</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; top: -3.868em; left: 0.529em;"><span class="texatom" id="MathJax-Span-180"><span class="mrow" id="MathJax-Span-181"><span class="mi" id="MathJax-Span-182" style="font-size: 70.7%; font-family: MathJax_Math-italic;">n</span><span class="mo" id="MathJax-Span-183" style="font-size: 70.7%; font-family: MathJax_Main;">−</span><span class="mn" id="MathJax-Span-184" style="font-size: 70.7%; font-family: MathJax_Main;">1</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.427em 1000.5em 4.372em -1000em); top: -4.33em; left: 50%; margin-left: -0.248em;"><span class="mtd" id="MathJax-Span-197"><span class="mrow" id="MathJax-Span-198"><span class="mi" id="MathJax-Span-199" style="font-family: MathJax_Math-italic;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(2.569em 1000.2em 4.197em -1000em); top: -2.202em; left: 50%; margin-left: -0.139em;"><span class="mtd" id="MathJax-Span-218"><span class="mrow" id="MathJax-Span-219"><span class="mo" id="MathJax-Span-220" style="font-family: MathJax_Main;">⋮</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.427em 1000.5em 4.372em -1000em); top: -0.802em; left: 50%; margin-left: -0.248em;"><span class="mtd" id="MathJax-Span-233"><span class="mrow" id="MathJax-Span-234"><span class="mi" id="MathJax-Span-235" style="font-family: MathJax_Math-italic;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span><span style="display: inline-block; width: 0px; height: 7.986em;"></span></span><span style="position: absolute; clip: rect(4.275em 1001.93em 11.555em -1000em); top: -7.986em; left: 4.96em;"><span style="display: inline-block; position: relative; width: 1.932em; height: 0px;"><span style="position: absolute; clip: rect(3.427em 1000.52em 4.178em -1000em); top: -7.138em; left: 50%; margin-left: -0.286em;"><span class="mtd" id="MathJax-Span-164"><span class="mrow" id="MathJax-Span-165"><span class="mi" id="MathJax-Span-166" style="font-family: MathJax_Math-italic;">x</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.427em 1000.52em 4.178em -1000em); top: -5.738em; left: 50%; margin-left: -0.286em;"><span class="mtd" id="MathJax-Span-185"><span class="mrow" id="MathJax-Span-186"><span class="mi" id="MathJax-Span-187" style="font-family: MathJax_Math-italic;">x</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.428em 1001.93em 4.375em -1000em); top: -4.33em; left: 50%; margin-left: -0.966em;"><span class="mtd" id="MathJax-Span-200"><span class="mrow" id="MathJax-Span-201"><span class="msubsup" id="MathJax-Span-202"><span style="display: inline-block; position: relative; width: 1.932em; height: 0px;"><span style="position: absolute; clip: rect(3.428em 1000.51em 4.177em -1000em); top: -4.018em; left: 0em;"><span class="mi" id="MathJax-Span-203" style="font-family: MathJax_Math-italic;">a</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; top: -3.868em; left: 0.529em;"><span class="texatom" id="MathJax-Span-204"><span class="mrow" id="MathJax-Span-205"><span class="mi" id="MathJax-Span-206" style="font-size: 70.7%; font-family: MathJax_Math-italic;">n</span><span class="mo" id="MathJax-Span-207" style="font-size: 70.7%; font-family: MathJax_Main;">−</span><span class="mn" id="MathJax-Span-208" style="font-size: 70.7%; font-family: MathJax_Main;">2</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(2.569em 1000.2em 4.197em -1000em); top: -2.202em; left: 50%; margin-left: -0.139em;"><span class="mtd" id="MathJax-Span-221"><span class="mrow" id="MathJax-Span-222"><span class="mo" id="MathJax-Span-223" style="font-family: MathJax_Main;">⋮</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.427em 1000.5em 4.372em -1000em); top: -0.802em; left: 50%; margin-left: -0.248em;"><span class="mtd" id="MathJax-Span-236"><span class="mrow" id="MathJax-Span-237"><span class="mi" id="MathJax-Span-238" style="font-family: MathJax_Math-italic;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span><span style="display: inline-block; width: 0px; height: 7.986em;"></span></span><span style="position: absolute; clip: rect(3.861em 1001.15em 10.615em -1000em); top: -7.44em; left: 7.892em;"><span style="display: inline-block; position: relative; width: 1.282em; height: 0px;"><span style="position: absolute; clip: rect(3.559em 1001.09em 3.977em -1000em); top: -7.138em; left: 50%; margin-left: -0.586em;"><span class="mtd" id="MathJax-Span-167"><span class="mrow" id="MathJax-Span-168"><span class="mo" id="MathJax-Span-169" style="font-family: MathJax_Main;">⋯</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.559em 1001.09em 3.977em -1000em); top: -5.738em; left: 50%; margin-left: -0.586em;"><span class="mtd" id="MathJax-Span-188"><span class="mrow" id="MathJax-Span-189"><span class="mo" id="MathJax-Span-190" style="font-family: MathJax_Main;">⋯</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.559em 1001.09em 3.977em -1000em); top: -4.33em; left: 50%; margin-left: -0.586em;"><span class="mtd" id="MathJax-Span-209"><span class="mrow" id="MathJax-Span-210"><span class="mo" id="MathJax-Span-211" style="font-family: MathJax_Main;">⋯</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(2.349em 1001.15em 4.067em -1000em); top: -2.202em; left: 50%; margin-left: -0.641em;"><span class="mtd" id="MathJax-Span-224"><span class="mrow" id="MathJax-Span-225"><span class="mo" id="MathJax-Span-226" style="font-family: MathJax_Main;">⋱</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.559em 1001.09em 3.977em -1000em); top: -0.802em; left: 50%; margin-left: -0.586em;"><span class="mtd" id="MathJax-Span-239"><span class="mrow" id="MathJax-Span-240"><span class="mo" id="MathJax-Span-241" style="font-family: MathJax_Main;">⋯</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span><span style="display: inline-block; width: 0px; height: 7.44em;"></span></span><span style="position: absolute; clip: rect(4.225em 1000.96em 11.451em -1000em); top: -7.937em; left: 10.174em;"><span style="display: inline-block; position: relative; width: 0.958em; height: 0px;"><span style="position: absolute; clip: rect(3.427em 1000.52em 4.178em -1000em); top: -7.138em; left: 50%; margin-left: -0.286em;"><span class="mtd" id="MathJax-Span-170"><span class="mrow" id="MathJax-Span-171"><span class="mi" id="MathJax-Span-172" style="font-family: MathJax_Math-italic;">x</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.427em 1000.52em 4.178em -1000em); top: -5.738em; left: 50%; margin-left: -0.286em;"><span class="mtd" id="MathJax-Span-191"><span class="mrow" id="MathJax-Span-192"><span class="mi" id="MathJax-Span-193" style="font-family: MathJax_Math-italic;">x</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.427em 1000.52em 4.178em -1000em); top: -4.33em; left: 50%; margin-left: -0.286em;"><span class="mtd" id="MathJax-Span-212"><span class="mrow" id="MathJax-Span-213"><span class="mi" id="MathJax-Span-214" style="font-family: MathJax_Math-italic;">x</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(2.569em 1000.2em 4.197em -1000em); top: -2.202em; left: 50%; margin-left: -0.139em;"><span class="mtd" id="MathJax-Span-227"><span class="mrow" id="MathJax-Span-228"><span class="mo" id="MathJax-Span-229" style="font-family: MathJax_Main;">⋮</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.428em 1000.96em 4.317em -1000em); top: -0.802em; left: 50%; margin-left: -0.479em;"><span class="mtd" id="MathJax-Span-242"><span class="mrow" id="MathJax-Span-243"><span class="msubsup" id="MathJax-Span-244"><span style="display: inline-block; position: relative; width: 0.958em; height: 0px;"><span style="position: absolute; clip: rect(3.428em 1000.51em 4.177em -1000em); top: -4.018em; left: 0em;"><span class="mi" id="MathJax-Span-245" style="font-family: MathJax_Math-italic;">a</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; top: -3.868em; left: 0.529em;"><span class="mn" id="MathJax-Span-246" style="font-size: 70.7%; font-family: MathJax_Main;">1</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span><span style="display: inline-block; width: 0px; height: 7.937em;"></span></span></span></span><span class="mo" id="MathJax-Span-247" style="vertical-align: 3.92em;"><span style="display: inline-block; position: relative; width: 0.278em; height: 0px;"><span style="position: absolute; font-family: MathJax_Main; top: -3.268em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; font-family: MathJax_Main; top: 3.074em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: -2.362em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: -1.456em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: -0.55em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: 0.356em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: 1.262em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: 2.168em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span></span></span></span><span style="display: inline-block; width: 0px; height: 8.333em;"></span></span><span style="position: absolute; clip: rect(4.264em 1016.67em 11.903em -1000em); top: -18.682em; left: 0em;"><span class="mtd" id="MathJax-Span-250"><span class="mrow" id="MathJax-Span-251"><span class="mi" id="MathJax-Span-252"></span><span class="mo" id="MathJax-Span-253" style="font-family: MathJax_Main; padding-left: 0.278em;">=</span><span class="mrow" id="MathJax-Span-254" style="padding-left: 0.278em;"><span class="mo" id="MathJax-Span-255" style="vertical-align: 3.92em;"><span style="display: inline-block; position: relative; width: 0.278em; height: 0px;"><span style="position: absolute; font-family: MathJax_Main; top: -3.268em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; font-family: MathJax_Main; top: 3.074em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: -2.362em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: -1.456em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: -0.55em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: 0.356em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: 1.262em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: 2.168em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span><span class="mtable" id="MathJax-Span-256" style="padding-right: 0.167em; padding-left: 0.167em;"><span style="display: inline-block; position: relative; width: 14.568em; height: 0px;"><span style="position: absolute; clip: rect(4.276em 1001.03em 11.555em -1000em); top: -7.986em; left: 0em;"><span style="display: inline-block; position: relative; width: 1.028em; height: 0px;"><span style="position: absolute; clip: rect(3.428em 1001.03em 4.324em -1000em); top: -7.138em; left: 50%; margin-left: -0.514em;"><span class="mtd" id="MathJax-Span-257"><span class="mrow" id="MathJax-Span-258"><span class="msubsup" id="MathJax-Span-259"><span style="display: inline-block; position: relative; width: 1.028em; height: 0px;"><span style="position: absolute; clip: rect(3.428em 1000.51em 4.177em -1000em); top: -4.018em; left: 0em;"><span class="mi" id="MathJax-Span-260" style="font-family: MathJax_Math-italic;">a</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; top: -3.868em; left: 0.529em;"><span class="mi" id="MathJax-Span-261" style="font-size: 70.7%; font-family: MathJax_Math-italic;">n</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.427em 1000.5em 4.372em -1000em); top: -5.738em; left: 50%; margin-left: -0.248em;"><span class="mtd" id="MathJax-Span-276"><span class="mrow" id="MathJax-Span-277"><span class="mi" id="MathJax-Span-278" style="font-family: MathJax_Math-italic;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.427em 1000.5em 4.372em -1000em); top: -4.33em; left: 50%; margin-left: -0.248em;"><span class="mtd" id="MathJax-Span-299"><span class="mrow" id="MathJax-Span-300"><span class="mi" id="MathJax-Span-301" style="font-family: MathJax_Math-italic;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(2.569em 1000.2em 4.197em -1000em); top: -2.202em; left: 50%; margin-left: -0.139em;"><span class="mtd" id="MathJax-Span-322"><span class="mrow" id="MathJax-Span-323"><span class="mo" id="MathJax-Span-324" style="font-family: MathJax_Main;">⋮</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.427em 1000.5em 4.372em -1000em); top: -0.802em; left: 50%; margin-left: -0.248em;"><span class="mtd" id="MathJax-Span-337"><span class="mrow" id="MathJax-Span-338"><span class="mi" id="MathJax-Span-339" style="font-family: MathJax_Math-italic;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span><span style="display: inline-block; width: 0px; height: 7.986em;"></span></span><span style="position: absolute; clip: rect(4.275em 1001.93em 11.555em -1000em); top: -7.986em; left: 2.028em;"><span style="display: inline-block; position: relative; width: 1.932em; height: 0px;"><span style="position: absolute; clip: rect(3.427em 1000.52em 4.178em -1000em); top: -7.138em; left: 50%; margin-left: -0.286em;"><span class="mtd" id="MathJax-Span-262"><span class="mrow" id="MathJax-Span-263"><span class="mi" id="MathJax-Span-264" style="font-family: MathJax_Math-italic;">x</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.428em 1001.93em 4.375em -1000em); top: -5.738em; left: 50%; margin-left: -0.966em;"><span class="mtd" id="MathJax-Span-279"><span class="mrow" id="MathJax-Span-280"><span class="msubsup" id="MathJax-Span-281"><span style="display: inline-block; position: relative; width: 1.932em; height: 0px;"><span style="position: absolute; clip: rect(3.428em 1000.51em 4.177em -1000em); top: -4.018em; left: 0em;"><span class="mi" id="MathJax-Span-282" style="font-family: MathJax_Math-italic;">a</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; top: -3.868em; left: 0.529em;"><span class="texatom" id="MathJax-Span-283"><span class="mrow" id="MathJax-Span-284"><span class="mi" id="MathJax-Span-285" style="font-size: 70.7%; font-family: MathJax_Math-italic;">n</span><span class="mo" id="MathJax-Span-286" style="font-size: 70.7%; font-family: MathJax_Main;">−</span><span class="mn" id="MathJax-Span-287" style="font-size: 70.7%; font-family: MathJax_Main;">1</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.427em 1000.5em 4.372em -1000em); top: -4.33em; left: 50%; margin-left: -0.248em;"><span class="mtd" id="MathJax-Span-302"><span class="mrow" id="MathJax-Span-303"><span class="mi" id="MathJax-Span-304" style="font-family: MathJax_Math-italic;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(2.569em 1000.2em 4.197em -1000em); top: -2.202em; left: 50%; margin-left: -0.139em;"><span class="mtd" id="MathJax-Span-325"><span class="mrow" id="MathJax-Span-326"><span class="mo" id="MathJax-Span-327" style="font-family: MathJax_Main;">⋮</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.427em 1000.5em 4.372em -1000em); top: -0.802em; left: 50%; margin-left: -0.248em;"><span class="mtd" id="MathJax-Span-340"><span class="mrow" id="MathJax-Span-341"><span class="mi" id="MathJax-Span-342" style="font-family: MathJax_Math-italic;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span><span style="display: inline-block; width: 0px; height: 7.986em;"></span></span><span style="position: absolute; clip: rect(4.275em 1001.93em 11.555em -1000em); top: -7.986em; left: 4.96em;"><span style="display: inline-block; position: relative; width: 1.932em; height: 0px;"><span style="position: absolute; clip: rect(3.427em 1000.52em 4.178em -1000em); top: -7.138em; left: 50%; margin-left: -0.286em;"><span class="mtd" id="MathJax-Span-265"><span class="mrow" id="MathJax-Span-266"><span class="mi" id="MathJax-Span-267" style="font-family: MathJax_Math-italic;">x</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.427em 1000.52em 4.178em -1000em); top: -5.738em; left: 50%; margin-left: -0.286em;"><span class="mtd" id="MathJax-Span-288"><span class="mrow" id="MathJax-Span-289"><span class="mi" id="MathJax-Span-290" style="font-family: MathJax_Math-italic;">x</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.428em 1001.93em 4.375em -1000em); top: -4.33em; left: 50%; margin-left: -0.966em;"><span class="mtd" id="MathJax-Span-305"><span class="mrow" id="MathJax-Span-306"><span class="msubsup" id="MathJax-Span-307"><span style="display: inline-block; position: relative; width: 1.932em; height: 0px;"><span style="position: absolute; clip: rect(3.428em 1000.51em 4.177em -1000em); top: -4.018em; left: 0em;"><span class="mi" id="MathJax-Span-308" style="font-family: MathJax_Math-italic;">a</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; top: -3.868em; left: 0.529em;"><span class="texatom" id="MathJax-Span-309"><span class="mrow" id="MathJax-Span-310"><span class="mi" id="MathJax-Span-311" style="font-size: 70.7%; font-family: MathJax_Math-italic;">n</span><span class="mo" id="MathJax-Span-312" style="font-size: 70.7%; font-family: MathJax_Main;">−</span><span class="mn" id="MathJax-Span-313" style="font-size: 70.7%; font-family: MathJax_Main;">2</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(2.569em 1000.2em 4.197em -1000em); top: -2.202em; left: 50%; margin-left: -0.139em;"><span class="mtd" id="MathJax-Span-328"><span class="mrow" id="MathJax-Span-329"><span class="mo" id="MathJax-Span-330" style="font-family: MathJax_Main;">⋮</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.427em 1000.5em 4.372em -1000em); top: -0.802em; left: 50%; margin-left: -0.248em;"><span class="mtd" id="MathJax-Span-343"><span class="mrow" id="MathJax-Span-344"><span class="mi" id="MathJax-Span-345" style="font-family: MathJax_Math-italic;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span><span style="display: inline-block; width: 0px; height: 7.986em;"></span></span><span style="position: absolute; clip: rect(3.861em 1001.15em 10.615em -1000em); top: -7.44em; left: 7.892em;"><span style="display: inline-block; position: relative; width: 1.282em; height: 0px;"><span style="position: absolute; clip: rect(3.559em 1001.09em 3.977em -1000em); top: -7.138em; left: 50%; margin-left: -0.586em;"><span class="mtd" id="MathJax-Span-268"><span class="mrow" id="MathJax-Span-269"><span class="mo" id="MathJax-Span-270" style="font-family: MathJax_Main;">⋯</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.559em 1001.09em 3.977em -1000em); top: -5.738em; left: 50%; margin-left: -0.586em;"><span class="mtd" id="MathJax-Span-291"><span class="mrow" id="MathJax-Span-292"><span class="mo" id="MathJax-Span-293" style="font-family: MathJax_Main;">⋯</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.559em 1001.09em 3.977em -1000em); top: -4.33em; left: 50%; margin-left: -0.586em;"><span class="mtd" id="MathJax-Span-314"><span class="mrow" id="MathJax-Span-315"><span class="mo" id="MathJax-Span-316" style="font-family: MathJax_Main;">⋯</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(2.349em 1001.15em 4.067em -1000em); top: -2.202em; left: 50%; margin-left: -0.641em;"><span class="mtd" id="MathJax-Span-331"><span class="mrow" id="MathJax-Span-332"><span class="mo" id="MathJax-Span-333" style="font-family: MathJax_Main;">⋱</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.559em 1001.09em 3.977em -1000em); top: -0.802em; left: 50%; margin-left: -0.586em;"><span class="mtd" id="MathJax-Span-346"><span class="mrow" id="MathJax-Span-347"><span class="mo" id="MathJax-Span-348" style="font-family: MathJax_Main;">⋯</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span><span style="display: inline-block; width: 0px; height: 7.44em;"></span></span><span style="position: absolute; clip: rect(4.249em 1004.39em 11.754em -1000em); top: -8.185em; left: 10.174em;"><span style="display: inline-block; position: relative; width: 4.394em; height: 0px;"><span style="position: absolute; clip: rect(3.203em 1002.25em 4.249em -1000em); top: -7.138em; left: 50%; margin-left: -1.147em;"><span class="mtd" id="MathJax-Span-271"><span class="mrow" id="MathJax-Span-272"><span class="mi" id="MathJax-Span-273" style="font-family: MathJax_Math-italic;">x</span><span class="mo" id="MathJax-Span-274" style="font-family: MathJax_Main; padding-left: 0.222em;">+</span><span class="mn" id="MathJax-Span-275" style="font-family: MathJax_Main; padding-left: 0.222em;">0</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.203em 1002.25em 4.249em -1000em); top: -5.738em; left: 50%; margin-left: -1.147em;"><span class="mtd" id="MathJax-Span-294"><span class="mrow" id="MathJax-Span-295"><span class="mi" id="MathJax-Span-296" style="font-family: MathJax_Math-italic;">x</span><span class="mo" id="MathJax-Span-297" style="font-family: MathJax_Main; padding-left: 0.222em;">+</span><span class="mn" id="MathJax-Span-298" style="font-family: MathJax_Main; padding-left: 0.222em;">0</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.203em 1002.25em 4.249em -1000em); top: -4.33em; left: 50%; margin-left: -1.147em;"><span class="mtd" id="MathJax-Span-317"><span class="mrow" id="MathJax-Span-318"><span class="mi" id="MathJax-Span-319" style="font-family: MathJax_Math-italic;">x</span><span class="mo" id="MathJax-Span-320" style="font-family: MathJax_Main; padding-left: 0.222em;">+</span><span class="mn" id="MathJax-Span-321" style="font-family: MathJax_Main; padding-left: 0.222em;">0</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(2.569em 1000.2em 4.197em -1000em); top: -2.202em; left: 50%; margin-left: -0.139em;"><span class="mtd" id="MathJax-Span-334"><span class="mrow" id="MathJax-Span-335"><span class="mo" id="MathJax-Span-336" style="font-family: MathJax_Main;">⋮</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.286em 1004.39em 4.372em -1000em); top: -0.802em; left: 50%; margin-left: -2.197em;"><span class="mtd" id="MathJax-Span-349"><span class="mrow" id="MathJax-Span-350"><span class="mi" id="MathJax-Span-351" style="font-family: MathJax_Math-italic;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span><span class="mo" id="MathJax-Span-352" style="font-family: MathJax_Main; padding-left: 0.222em;">+</span><span class="msubsup" id="MathJax-Span-353" style="padding-left: 0.222em;"><span style="display: inline-block; position: relative; width: 0.958em; height: 0px;"><span style="position: absolute; clip: rect(3.428em 1000.51em 4.177em -1000em); top: -4.018em; left: 0em;"><span class="mi" id="MathJax-Span-354" style="font-family: MathJax_Math-italic;">a</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; top: -3.868em; left: 0.529em;"><span class="mn" id="MathJax-Span-355" style="font-size: 70.7%; font-family: MathJax_Main;">1</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span><span class="mo" id="MathJax-Span-356" style="font-family: MathJax_Main; padding-left: 0.222em;">−</span><span class="mi" id="MathJax-Span-357" style="font-family: MathJax_Math-italic; padding-left: 0.222em;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span><span style="display: inline-block; width: 0px; height: 8.185em;"></span></span></span></span><span class="mo" id="MathJax-Span-358" style="vertical-align: 3.92em;"><span style="display: inline-block; position: relative; width: 0.278em; height: 0px;"><span style="position: absolute; font-family: MathJax_Main; top: -3.268em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; font-family: MathJax_Main; top: 3.074em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: -2.362em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: -1.456em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: -0.55em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: 0.356em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: 1.262em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: 2.168em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span></span></span></span><span style="display: inline-block; width: 0px; height: 8.333em;"></span></span><span style="position: absolute; clip: rect(4.264em 1027.81em 11.903em -1000em); top: -11.041em; left: 0em;"><span class="mtd" id="MathJax-Span-361"><span class="mrow" id="MathJax-Span-362"><span class="mi" id="MathJax-Span-363"></span><span class="mo" id="MathJax-Span-364" style="font-family: MathJax_Main; padding-left: 0.278em;">=</span><span class="mrow" id="MathJax-Span-365" style="padding-left: 0.278em;"><span class="mo" id="MathJax-Span-366" style="vertical-align: 3.92em;"><span style="display: inline-block; position: relative; width: 0.278em; height: 0px;"><span style="position: absolute; font-family: MathJax_Main; top: -3.268em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; font-family: MathJax_Main; top: 3.074em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: -2.362em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: -1.456em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: -0.55em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: 0.356em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: 1.262em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: 2.168em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span><span class="mtable" id="MathJax-Span-367" style="padding-right: 0.167em; padding-left: 0.167em;"><span style="display: inline-block; position: relative; width: 10.746em; height: 0px;"><span style="position: absolute; clip: rect(4.276em 1001.03em 11.555em -1000em); top: -7.986em; left: 0em;"><span style="display: inline-block; position: relative; width: 1.028em; height: 0px;"><span style="position: absolute; clip: rect(3.428em 1001.03em 4.324em -1000em); top: -7.138em; left: 50%; margin-left: -0.514em;"><span class="mtd" id="MathJax-Span-368"><span class="mrow" id="MathJax-Span-369"><span class="msubsup" id="MathJax-Span-370"><span style="display: inline-block; position: relative; width: 1.028em; height: 0px;"><span style="position: absolute; clip: rect(3.428em 1000.51em 4.177em -1000em); top: -4.018em; left: 0em;"><span class="mi" id="MathJax-Span-371" style="font-family: MathJax_Math-italic;">a</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; top: -3.868em; left: 0.529em;"><span class="mi" id="MathJax-Span-372" style="font-size: 70.7%; font-family: MathJax_Math-italic;">n</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.427em 1000.5em 4.372em -1000em); top: -5.738em; left: 50%; margin-left: -0.248em;"><span class="mtd" id="MathJax-Span-385"><span class="mrow" id="MathJax-Span-386"><span class="mi" id="MathJax-Span-387" style="font-family: MathJax_Math-italic;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.427em 1000.5em 4.372em -1000em); top: -4.33em; left: 50%; margin-left: -0.248em;"><span class="mtd" id="MathJax-Span-406"><span class="mrow" id="MathJax-Span-407"><span class="mi" id="MathJax-Span-408" style="font-family: MathJax_Math-italic;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(2.569em 1000.2em 4.197em -1000em); top: -2.202em; left: 50%; margin-left: -0.139em;"><span class="mtd" id="MathJax-Span-427"><span class="mrow" id="MathJax-Span-428"><span class="mo" id="MathJax-Span-429" style="font-family: MathJax_Main;">⋮</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.427em 1000.5em 4.372em -1000em); top: -0.802em; left: 50%; margin-left: -0.248em;"><span class="mtd" id="MathJax-Span-442"><span class="mrow" id="MathJax-Span-443"><span class="mi" id="MathJax-Span-444" style="font-family: MathJax_Math-italic;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span><span style="display: inline-block; width: 0px; height: 7.986em;"></span></span><span style="position: absolute; clip: rect(4.275em 1001.93em 11.555em -1000em); top: -7.986em; left: 2.028em;"><span style="display: inline-block; position: relative; width: 1.932em; height: 0px;"><span style="position: absolute; clip: rect(3.427em 1000.52em 4.178em -1000em); top: -7.138em; left: 50%; margin-left: -0.286em;"><span class="mtd" id="MathJax-Span-373"><span class="mrow" id="MathJax-Span-374"><span class="mi" id="MathJax-Span-375" style="font-family: MathJax_Math-italic;">x</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.428em 1001.93em 4.375em -1000em); top: -5.738em; left: 50%; margin-left: -0.966em;"><span class="mtd" id="MathJax-Span-388"><span class="mrow" id="MathJax-Span-389"><span class="msubsup" id="MathJax-Span-390"><span style="display: inline-block; position: relative; width: 1.932em; height: 0px;"><span style="position: absolute; clip: rect(3.428em 1000.51em 4.177em -1000em); top: -4.018em; left: 0em;"><span class="mi" id="MathJax-Span-391" style="font-family: MathJax_Math-italic;">a</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; top: -3.868em; left: 0.529em;"><span class="texatom" id="MathJax-Span-392"><span class="mrow" id="MathJax-Span-393"><span class="mi" id="MathJax-Span-394" style="font-size: 70.7%; font-family: MathJax_Math-italic;">n</span><span class="mo" id="MathJax-Span-395" style="font-size: 70.7%; font-family: MathJax_Main;">−</span><span class="mn" id="MathJax-Span-396" style="font-size: 70.7%; font-family: MathJax_Main;">1</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.427em 1000.5em 4.372em -1000em); top: -4.33em; left: 50%; margin-left: -0.248em;"><span class="mtd" id="MathJax-Span-409"><span class="mrow" id="MathJax-Span-410"><span class="mi" id="MathJax-Span-411" style="font-family: MathJax_Math-italic;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(2.569em 1000.2em 4.197em -1000em); top: -2.202em; left: 50%; margin-left: -0.139em;"><span class="mtd" id="MathJax-Span-430"><span class="mrow" id="MathJax-Span-431"><span class="mo" id="MathJax-Span-432" style="font-family: MathJax_Main;">⋮</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.427em 1000.5em 4.372em -1000em); top: -0.802em; left: 50%; margin-left: -0.248em;"><span class="mtd" id="MathJax-Span-445"><span class="mrow" id="MathJax-Span-446"><span class="mi" id="MathJax-Span-447" style="font-family: MathJax_Math-italic;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span><span style="display: inline-block; width: 0px; height: 7.986em;"></span></span><span style="position: absolute; clip: rect(4.275em 1001.93em 11.555em -1000em); top: -7.986em; left: 4.96em;"><span style="display: inline-block; position: relative; width: 1.932em; height: 0px;"><span style="position: absolute; clip: rect(3.427em 1000.52em 4.178em -1000em); top: -7.138em; left: 50%; margin-left: -0.286em;"><span class="mtd" id="MathJax-Span-376"><span class="mrow" id="MathJax-Span-377"><span class="mi" id="MathJax-Span-378" style="font-family: MathJax_Math-italic;">x</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.427em 1000.52em 4.178em -1000em); top: -5.738em; left: 50%; margin-left: -0.286em;"><span class="mtd" id="MathJax-Span-397"><span class="mrow" id="MathJax-Span-398"><span class="mi" id="MathJax-Span-399" style="font-family: MathJax_Math-italic;">x</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.428em 1001.93em 4.375em -1000em); top: -4.33em; left: 50%; margin-left: -0.966em;"><span class="mtd" id="MathJax-Span-412"><span class="mrow" id="MathJax-Span-413"><span class="msubsup" id="MathJax-Span-414"><span style="display: inline-block; position: relative; width: 1.932em; height: 0px;"><span style="position: absolute; clip: rect(3.428em 1000.51em 4.177em -1000em); top: -4.018em; left: 0em;"><span class="mi" id="MathJax-Span-415" style="font-family: MathJax_Math-italic;">a</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; top: -3.868em; left: 0.529em;"><span class="texatom" id="MathJax-Span-416"><span class="mrow" id="MathJax-Span-417"><span class="mi" id="MathJax-Span-418" style="font-size: 70.7%; font-family: MathJax_Math-italic;">n</span><span class="mo" id="MathJax-Span-419" style="font-size: 70.7%; font-family: MathJax_Main;">−</span><span class="mn" id="MathJax-Span-420" style="font-size: 70.7%; font-family: MathJax_Main;">2</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(2.569em 1000.2em 4.197em -1000em); top: -2.202em; left: 50%; margin-left: -0.139em;"><span class="mtd" id="MathJax-Span-433"><span class="mrow" id="MathJax-Span-434"><span class="mo" id="MathJax-Span-435" style="font-family: MathJax_Main;">⋮</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.427em 1000.5em 4.372em -1000em); top: -0.802em; left: 50%; margin-left: -0.248em;"><span class="mtd" id="MathJax-Span-448"><span class="mrow" id="MathJax-Span-449"><span class="mi" id="MathJax-Span-450" style="font-family: MathJax_Math-italic;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span><span style="display: inline-block; width: 0px; height: 7.986em;"></span></span><span style="position: absolute; clip: rect(3.861em 1001.15em 10.615em -1000em); top: -7.44em; left: 7.892em;"><span style="display: inline-block; position: relative; width: 1.282em; height: 0px;"><span style="position: absolute; clip: rect(3.559em 1001.09em 3.977em -1000em); top: -7.138em; left: 50%; margin-left: -0.586em;"><span class="mtd" id="MathJax-Span-379"><span class="mrow" id="MathJax-Span-380"><span class="mo" id="MathJax-Span-381" style="font-family: MathJax_Main;">⋯</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.559em 1001.09em 3.977em -1000em); top: -5.738em; left: 50%; margin-left: -0.586em;"><span class="mtd" id="MathJax-Span-400"><span class="mrow" id="MathJax-Span-401"><span class="mo" id="MathJax-Span-402" style="font-family: MathJax_Main;">⋯</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.559em 1001.09em 3.977em -1000em); top: -4.33em; left: 50%; margin-left: -0.586em;"><span class="mtd" id="MathJax-Span-421"><span class="mrow" id="MathJax-Span-422"><span class="mo" id="MathJax-Span-423" style="font-family: MathJax_Main;">⋯</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(2.349em 1001.15em 4.067em -1000em); top: -2.202em; left: 50%; margin-left: -0.641em;"><span class="mtd" id="MathJax-Span-436"><span class="mrow" id="MathJax-Span-437"><span class="mo" id="MathJax-Span-438" style="font-family: MathJax_Main;">⋱</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.559em 1001.09em 3.977em -1000em); top: -0.802em; left: 50%; margin-left: -0.586em;"><span class="mtd" id="MathJax-Span-451"><span class="mrow" id="MathJax-Span-452"><span class="mo" id="MathJax-Span-453" style="font-family: MathJax_Main;">⋯</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span><span style="display: inline-block; width: 0px; height: 7.44em;"></span></span><span style="position: absolute; clip: rect(4.275em 1000.52em 11.555em -1000em); top: -7.986em; left: 10.174em;"><span style="display: inline-block; position: relative; width: 0.572em; height: 0px;"><span style="position: absolute; clip: rect(3.427em 1000.52em 4.178em -1000em); top: -7.138em; left: 50%; margin-left: -0.286em;"><span class="mtd" id="MathJax-Span-382"><span class="mrow" id="MathJax-Span-383"><span class="mi" id="MathJax-Span-384" style="font-family: MathJax_Math-italic;">x</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.427em 1000.52em 4.178em -1000em); top: -5.738em; left: 50%; margin-left: -0.286em;"><span class="mtd" id="MathJax-Span-403"><span class="mrow" id="MathJax-Span-404"><span class="mi" id="MathJax-Span-405" style="font-family: MathJax_Math-italic;">x</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.427em 1000.52em 4.178em -1000em); top: -4.33em; left: 50%; margin-left: -0.286em;"><span class="mtd" id="MathJax-Span-424"><span class="mrow" id="MathJax-Span-425"><span class="mi" id="MathJax-Span-426" style="font-family: MathJax_Math-italic;">x</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(2.569em 1000.2em 4.197em -1000em); top: -2.202em; left: 50%; margin-left: -0.139em;"><span class="mtd" id="MathJax-Span-439"><span class="mrow" id="MathJax-Span-440"><span class="mo" id="MathJax-Span-441" style="font-family: MathJax_Main;">⋮</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.427em 1000.5em 4.372em -1000em); top: -0.802em; left: 50%; margin-left: -0.248em;"><span class="mtd" id="MathJax-Span-454"><span class="mrow" id="MathJax-Span-455"><span class="mi" id="MathJax-Span-456" style="font-family: MathJax_Math-italic;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span><span style="display: inline-block; width: 0px; height: 7.986em;"></span></span></span></span><span class="mo" id="MathJax-Span-457" style="vertical-align: 3.92em;"><span style="display: inline-block; position: relative; width: 0.278em; height: 0px;"><span style="position: absolute; font-family: MathJax_Main; top: -3.268em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; font-family: MathJax_Main; top: 3.074em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: -2.362em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: -1.456em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: -0.55em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: 0.356em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: 1.262em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: 2.168em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span></span><span class="mo" id="MathJax-Span-458" style="font-family: MathJax_Main; padding-left: 0.222em;">+</span><span class="mrow" id="MathJax-Span-459" style="padding-left: 0.222em;"><span class="mo" id="MathJax-Span-460" style="vertical-align: 3.92em;"><span style="display: inline-block; position: relative; width: 0.278em; height: 0px;"><span style="position: absolute; font-family: MathJax_Main; top: -3.268em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; font-family: MathJax_Main; top: 3.074em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: -2.362em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: -1.456em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: -0.55em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: 0.356em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: 1.262em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: 2.168em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span><span class="mtable" id="MathJax-Span-461" style="padding-right: 0.167em; padding-left: 0.167em;"><span style="display: inline-block; position: relative; width: 12.85em; height: 0px;"><span style="position: absolute; clip: rect(4.276em 1001.03em 11.555em -1000em); top: -7.986em; left: 0em;"><span style="display: inline-block; position: relative; width: 1.028em; height: 0px;"><span style="position: absolute; clip: rect(3.428em 1001.03em 4.324em -1000em); top: -7.138em; left: 50%; margin-left: -0.514em;"><span class="mtd" id="MathJax-Span-462"><span class="mrow" id="MathJax-Span-463"><span class="msubsup" id="MathJax-Span-464"><span style="display: inline-block; position: relative; width: 1.028em; height: 0px;"><span style="position: absolute; clip: rect(3.428em 1000.51em 4.177em -1000em); top: -4.018em; left: 0em;"><span class="mi" id="MathJax-Span-465" style="font-family: MathJax_Math-italic;">a</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; top: -3.868em; left: 0.529em;"><span class="mi" id="MathJax-Span-466" style="font-size: 70.7%; font-family: MathJax_Math-italic;">n</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.427em 1000.5em 4.372em -1000em); top: -5.738em; left: 50%; margin-left: -0.248em;"><span class="mtd" id="MathJax-Span-479"><span class="mrow" id="MathJax-Span-480"><span class="mi" id="MathJax-Span-481" style="font-family: MathJax_Math-italic;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.427em 1000.5em 4.372em -1000em); top: -4.33em; left: 50%; margin-left: -0.248em;"><span class="mtd" id="MathJax-Span-500"><span class="mrow" id="MathJax-Span-501"><span class="mi" id="MathJax-Span-502" style="font-family: MathJax_Math-italic;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(2.569em 1000.2em 4.197em -1000em); top: -2.202em; left: 50%; margin-left: -0.139em;"><span class="mtd" id="MathJax-Span-521"><span class="mrow" id="MathJax-Span-522"><span class="mo" id="MathJax-Span-523" style="font-family: MathJax_Main;">⋮</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.427em 1000.5em 4.372em -1000em); top: -0.802em; left: 50%; margin-left: -0.248em;"><span class="mtd" id="MathJax-Span-536"><span class="mrow" id="MathJax-Span-537"><span class="mi" id="MathJax-Span-538" style="font-family: MathJax_Math-italic;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span><span style="display: inline-block; width: 0px; height: 7.986em;"></span></span><span style="position: absolute; clip: rect(4.275em 1001.93em 11.555em -1000em); top: -7.986em; left: 2.028em;"><span style="display: inline-block; position: relative; width: 1.932em; height: 0px;"><span style="position: absolute; clip: rect(3.427em 1000.52em 4.178em -1000em); top: -7.138em; left: 50%; margin-left: -0.286em;"><span class="mtd" id="MathJax-Span-467"><span class="mrow" id="MathJax-Span-468"><span class="mi" id="MathJax-Span-469" style="font-family: MathJax_Math-italic;">x</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.428em 1001.93em 4.375em -1000em); top: -5.738em; left: 50%; margin-left: -0.966em;"><span class="mtd" id="MathJax-Span-482"><span class="mrow" id="MathJax-Span-483"><span class="msubsup" id="MathJax-Span-484"><span style="display: inline-block; position: relative; width: 1.932em; height: 0px;"><span style="position: absolute; clip: rect(3.428em 1000.51em 4.177em -1000em); top: -4.018em; left: 0em;"><span class="mi" id="MathJax-Span-485" style="font-family: MathJax_Math-italic;">a</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; top: -3.868em; left: 0.529em;"><span class="texatom" id="MathJax-Span-486"><span class="mrow" id="MathJax-Span-487"><span class="mi" id="MathJax-Span-488" style="font-size: 70.7%; font-family: MathJax_Math-italic;">n</span><span class="mo" id="MathJax-Span-489" style="font-size: 70.7%; font-family: MathJax_Main;">−</span><span class="mn" id="MathJax-Span-490" style="font-size: 70.7%; font-family: MathJax_Main;">1</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.427em 1000.5em 4.372em -1000em); top: -4.33em; left: 50%; margin-left: -0.248em;"><span class="mtd" id="MathJax-Span-503"><span class="mrow" id="MathJax-Span-504"><span class="mi" id="MathJax-Span-505" style="font-family: MathJax_Math-italic;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(2.569em 1000.2em 4.197em -1000em); top: -2.202em; left: 50%; margin-left: -0.139em;"><span class="mtd" id="MathJax-Span-524"><span class="mrow" id="MathJax-Span-525"><span class="mo" id="MathJax-Span-526" style="font-family: MathJax_Main;">⋮</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.427em 1000.5em 4.372em -1000em); top: -0.802em; left: 50%; margin-left: -0.248em;"><span class="mtd" id="MathJax-Span-539"><span class="mrow" id="MathJax-Span-540"><span class="mi" id="MathJax-Span-541" style="font-family: MathJax_Math-italic;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span><span style="display: inline-block; width: 0px; height: 7.986em;"></span></span><span style="position: absolute; clip: rect(4.275em 1001.93em 11.555em -1000em); top: -7.986em; left: 4.96em;"><span style="display: inline-block; position: relative; width: 1.932em; height: 0px;"><span style="position: absolute; clip: rect(3.427em 1000.52em 4.178em -1000em); top: -7.138em; left: 50%; margin-left: -0.286em;"><span class="mtd" id="MathJax-Span-470"><span class="mrow" id="MathJax-Span-471"><span class="mi" id="MathJax-Span-472" style="font-family: MathJax_Math-italic;">x</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.427em 1000.52em 4.178em -1000em); top: -5.738em; left: 50%; margin-left: -0.286em;"><span class="mtd" id="MathJax-Span-491"><span class="mrow" id="MathJax-Span-492"><span class="mi" id="MathJax-Span-493" style="font-family: MathJax_Math-italic;">x</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.428em 1001.93em 4.375em -1000em); top: -4.33em; left: 50%; margin-left: -0.966em;"><span class="mtd" id="MathJax-Span-506"><span class="mrow" id="MathJax-Span-507"><span class="msubsup" id="MathJax-Span-508"><span style="display: inline-block; position: relative; width: 1.932em; height: 0px;"><span style="position: absolute; clip: rect(3.428em 1000.51em 4.177em -1000em); top: -4.018em; left: 0em;"><span class="mi" id="MathJax-Span-509" style="font-family: MathJax_Math-italic;">a</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; top: -3.868em; left: 0.529em;"><span class="texatom" id="MathJax-Span-510"><span class="mrow" id="MathJax-Span-511"><span class="mi" id="MathJax-Span-512" style="font-size: 70.7%; font-family: MathJax_Math-italic;">n</span><span class="mo" id="MathJax-Span-513" style="font-size: 70.7%; font-family: MathJax_Main;">−</span><span class="mn" id="MathJax-Span-514" style="font-size: 70.7%; font-family: MathJax_Main;">2</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(2.569em 1000.2em 4.197em -1000em); top: -2.202em; left: 50%; margin-left: -0.139em;"><span class="mtd" id="MathJax-Span-527"><span class="mrow" id="MathJax-Span-528"><span class="mo" id="MathJax-Span-529" style="font-family: MathJax_Main;">⋮</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.427em 1000.5em 4.372em -1000em); top: -0.802em; left: 50%; margin-left: -0.248em;"><span class="mtd" id="MathJax-Span-542"><span class="mrow" id="MathJax-Span-543"><span class="mi" id="MathJax-Span-544" style="font-family: MathJax_Math-italic;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span><span style="display: inline-block; width: 0px; height: 7.986em;"></span></span><span style="position: absolute; clip: rect(3.861em 1001.15em 10.615em -1000em); top: -7.44em; left: 7.892em;"><span style="display: inline-block; position: relative; width: 1.282em; height: 0px;"><span style="position: absolute; clip: rect(3.559em 1001.09em 3.977em -1000em); top: -7.138em; left: 50%; margin-left: -0.586em;"><span class="mtd" id="MathJax-Span-473"><span class="mrow" id="MathJax-Span-474"><span class="mo" id="MathJax-Span-475" style="font-family: MathJax_Main;">⋯</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.559em 1001.09em 3.977em -1000em); top: -5.738em; left: 50%; margin-left: -0.586em;"><span class="mtd" id="MathJax-Span-494"><span class="mrow" id="MathJax-Span-495"><span class="mo" id="MathJax-Span-496" style="font-family: MathJax_Main;">⋯</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.559em 1001.09em 3.977em -1000em); top: -4.33em; left: 50%; margin-left: -0.586em;"><span class="mtd" id="MathJax-Span-515"><span class="mrow" id="MathJax-Span-516"><span class="mo" id="MathJax-Span-517" style="font-family: MathJax_Main;">⋯</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(2.349em 1001.15em 4.067em -1000em); top: -2.202em; left: 50%; margin-left: -0.641em;"><span class="mtd" id="MathJax-Span-530"><span class="mrow" id="MathJax-Span-531"><span class="mo" id="MathJax-Span-532" style="font-family: MathJax_Main;">⋱</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.559em 1001.09em 3.977em -1000em); top: -0.802em; left: 50%; margin-left: -0.586em;"><span class="mtd" id="MathJax-Span-545"><span class="mrow" id="MathJax-Span-546"><span class="mo" id="MathJax-Span-547" style="font-family: MathJax_Main;">⋯</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span><span style="display: inline-block; width: 0px; height: 7.44em;"></span></span><span style="position: absolute; clip: rect(4.249em 1002.68em 11.754em -1000em); top: -8.185em; left: 10.174em;"><span style="display: inline-block; position: relative; width: 2.676em; height: 0px;"><span style="position: absolute; clip: rect(3.203em 1000.46em 4.189em -1000em); top: -7.138em; left: 50%; margin-left: -0.25em;"><span class="mtd" id="MathJax-Span-476"><span class="mrow" id="MathJax-Span-477"><span class="mn" id="MathJax-Span-478" style="font-family: MathJax_Main;">0</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.203em 1000.46em 4.189em -1000em); top: -5.738em; left: 50%; margin-left: -0.25em;"><span class="mtd" id="MathJax-Span-497"><span class="mrow" id="MathJax-Span-498"><span class="mn" id="MathJax-Span-499" style="font-family: MathJax_Main;">0</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.203em 1000.46em 4.189em -1000em); top: -4.33em; left: 50%; margin-left: -0.25em;"><span class="mtd" id="MathJax-Span-518"><span class="mrow" id="MathJax-Span-519"><span class="mn" id="MathJax-Span-520" style="font-family: MathJax_Main;">0</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(2.569em 1000.2em 4.197em -1000em); top: -2.202em; left: 50%; margin-left: -0.139em;"><span class="mtd" id="MathJax-Span-533"><span class="mrow" id="MathJax-Span-534"><span class="mo" id="MathJax-Span-535" style="font-family: MathJax_Main;">⋮</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.286em 1002.68em 4.372em -1000em); top: -0.802em; left: 50%; margin-left: -1.338em;"><span class="mtd" id="MathJax-Span-548"><span class="mrow" id="MathJax-Span-549"><span class="msubsup" id="MathJax-Span-550"><span style="display: inline-block; position: relative; width: 0.958em; height: 0px;"><span style="position: absolute; clip: rect(3.428em 1000.51em 4.177em -1000em); top: -4.018em; left: 0em;"><span class="mi" id="MathJax-Span-551" style="font-family: MathJax_Math-italic;">a</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; top: -3.868em; left: 0.529em;"><span class="mn" id="MathJax-Span-552" style="font-size: 70.7%; font-family: MathJax_Main;">1</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span><span class="mo" id="MathJax-Span-553" style="font-family: MathJax_Main; padding-left: 0.222em;">−</span><span class="mi" id="MathJax-Span-554" style="font-family: MathJax_Math-italic; padding-left: 0.222em;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span><span style="display: inline-block; width: 0px; height: 8.185em;"></span></span></span></span><span class="mo" id="MathJax-Span-555" style="vertical-align: 3.92em;"><span style="display: inline-block; position: relative; width: 0.278em; height: 0px;"><span style="position: absolute; font-family: MathJax_Main; top: -3.268em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; font-family: MathJax_Main; top: 3.074em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: -2.362em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: -1.456em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: -0.55em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: 0.356em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: 1.262em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: 2.168em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span></span></span></span><span style="display: inline-block; width: 0px; height: 8.333em;"></span></span><span style="position: absolute; clip: rect(3.069em 1017.55em 4.417em -1000em); top: -2.205em; left: 0em;"><span class="mtd" id="MathJax-Span-558"><span class="mrow" id="MathJax-Span-559"><span class="mi" id="MathJax-Span-560"></span><span class="mo" id="MathJax-Span-561" style="font-family: MathJax_Main;">(</span><span class="texatom" id="MathJax-Span-562"><span class="mrow" id="MathJax-Span-563"><span class="mo" id="MathJax-Span-564"><span style="font-family: STIXGeneral, &quot;Arial Unicode MS&quot;, serif; font-size: 79%; font-style: normal; font-weight: normal;">左</span></span></span></span><span class="texatom" id="MathJax-Span-565"><span class="mrow" id="MathJax-Span-566"><span class="mo" id="MathJax-Span-567"><span style="font-family: STIXGeneral, &quot;Arial Unicode MS&quot;, serif; font-size: 79%; font-style: normal; font-weight: normal;">边</span></span></span></span><span class="texatom" id="MathJax-Span-568"><span class="mrow" id="MathJax-Span-569"><span class="mo" id="MathJax-Span-570"><span style="font-family: STIXGeneral, &quot;Arial Unicode MS&quot;, serif; font-size: 79%; font-style: normal; font-weight: normal;">行</span></span></span></span><span class="texatom" id="MathJax-Span-571"><span class="mrow" id="MathJax-Span-572"><span class="mo" id="MathJax-Span-573"><span style="font-family: STIXGeneral, &quot;Arial Unicode MS&quot;, serif; font-size: 79%; font-style: normal; font-weight: normal;">列</span></span></span></span><span class="texatom" id="MathJax-Span-574"><span class="mrow" id="MathJax-Span-575"><span class="mo" id="MathJax-Span-576"><span style="font-family: STIXGeneral, &quot;Arial Unicode MS&quot;, serif; font-size: 79%; font-style: normal; font-weight: normal;">式</span></span></span></span><span class="texatom" id="MathJax-Span-577"><span class="mrow" id="MathJax-Span-578"><span class="mo" id="MathJax-Span-579"><span style="font-family: STIXGeneral, &quot;Arial Unicode MS&quot;, serif; font-size: 79%; font-style: normal; font-weight: normal;">的</span></span></span></span><span class="mn" id="MathJax-Span-580" style="font-family: MathJax_Main;">1</span><span class="texatom" id="MathJax-Span-581"><span class="mrow" id="MathJax-Span-582"><span class="mo" id="MathJax-Span-583"><span style="font-family: STIXGeneral, &quot;Arial Unicode MS&quot;, serif; font-size: 79%; font-style: normal; font-weight: normal;">至</span></span></span></span><span class="mi" id="MathJax-Span-584" style="font-family: MathJax_Math-italic;">n</span><span class="mo" id="MathJax-Span-585" style="font-family: MathJax_Main; padding-left: 0.222em;">−</span><span class="mn" id="MathJax-Span-586" style="font-family: MathJax_Main; padding-left: 0.222em;">1</span><span class="texatom" id="MathJax-Span-587"><span class="mrow" id="MathJax-Span-588"><span class="mo" id="MathJax-Span-589"><span style="font-family: STIXGeneral, &quot;Arial Unicode MS&quot;, serif; font-size: 79%; font-style: normal; font-weight: normal;">列</span></span></span></span><span class="texatom" id="MathJax-Span-590"><span class="mrow" id="MathJax-Span-591"><span class="mo" id="MathJax-Span-592"><span style="font-family: STIXGeneral, &quot;Arial Unicode MS&quot;, serif; font-size: 79%; font-style: normal; font-weight: normal;">分</span></span></span></span><span class="texatom" id="MathJax-Span-593"><span class="mrow" id="MathJax-Span-594"><span class="mo" id="MathJax-Span-595"><span style="font-family: STIXGeneral, &quot;Arial Unicode MS&quot;, serif; font-size: 79%; font-style: normal; font-weight: normal;">别</span></span></span></span><span class="texatom" id="MathJax-Span-596"><span class="mrow" id="MathJax-Span-597"><span class="mo" id="MathJax-Span-598"><span style="font-family: STIXGeneral, &quot;Arial Unicode MS&quot;, serif; font-size: 79%; font-style: normal; font-weight: normal;">减</span></span></span></span><span class="texatom" id="MathJax-Span-599"><span class="mrow" id="MathJax-Span-600"><span class="mo" id="MathJax-Span-601"><span style="font-family: STIXGeneral, &quot;Arial Unicode MS&quot;, serif; font-size: 79%; font-style: normal; font-weight: normal;">去</span></span></span></span><span class="texatom" id="MathJax-Span-602"><span class="mrow" id="MathJax-Span-603"><span class="mo" id="MathJax-Span-604"><span style="font-family: STIXGeneral, &quot;Arial Unicode MS&quot;, serif; font-size: 79%; font-style: normal; font-weight: normal;">第</span></span></span></span><span class="mi" id="MathJax-Span-605" style="font-family: MathJax_Math-italic;">n</span><span class="texatom" id="MathJax-Span-606"><span class="mrow" id="MathJax-Span-607"><span class="mo" id="MathJax-Span-608"><span style="font-family: STIXGeneral, &quot;Arial Unicode MS&quot;, serif; font-size: 79%; font-style: normal; font-weight: normal;">列</span></span></span></span><span class="mo" id="MathJax-Span-609" style="font-family: MathJax_Main;">,</span><span class="texatom" id="MathJax-Span-610" style="padding-left: 0.167em;"><span class="mrow" id="MathJax-Span-611"><span class="mo" id="MathJax-Span-612"><span style="font-family: STIXGeneral, &quot;Arial Unicode MS&quot;, serif; font-size: 79%; font-style: normal; font-weight: normal;">右</span></span></span></span><span class="texatom" id="MathJax-Span-613"><span class="mrow" id="MathJax-Span-614"><span class="mo" id="MathJax-Span-615"><span style="font-family: STIXGeneral, &quot;Arial Unicode MS&quot;, serif; font-size: 79%; font-style: normal; font-weight: normal;">边</span></span></span></span><span class="texatom" id="MathJax-Span-616"><span class="mrow" id="MathJax-Span-617"><span class="mo" id="MathJax-Span-618"><span style="font-family: STIXGeneral, &quot;Arial Unicode MS&quot;, serif; font-size: 79%; font-style: normal; font-weight: normal;">行</span></span></span></span><span class="texatom" id="MathJax-Span-619"><span class="mrow" id="MathJax-Span-620"><span class="mo" id="MathJax-Span-621"><span style="font-family: STIXGeneral, &quot;Arial Unicode MS&quot;, serif; font-size: 79%; font-style: normal; font-weight: normal;">列</span></span></span></span><span class="texatom" id="MathJax-Span-622"><span class="mrow" id="MathJax-Span-623"><span class="mo" id="MathJax-Span-624"><span style="font-family: STIXGeneral, &quot;Arial Unicode MS&quot;, serif; font-size: 79%; font-style: normal; font-weight: normal;">式</span></span></span></span><span class="texatom" id="MathJax-Span-625"><span class="mrow" id="MathJax-Span-626"><span class="mo" id="MathJax-Span-627"><span style="font-family: STIXGeneral, &quot;Arial Unicode MS&quot;, serif; font-size: 79%; font-style: normal; font-weight: normal;">按</span></span></span></span><span class="texatom" id="MathJax-Span-628"><span class="mrow" id="MathJax-Span-629"><span class="mo" id="MathJax-Span-630"><span style="font-family: STIXGeneral, &quot;Arial Unicode MS&quot;, serif; font-size: 79%; font-style: normal; font-weight: normal;">最</span></span></span></span><span class="texatom" id="MathJax-Span-631"><span class="mrow" id="MathJax-Span-632"><span class="mo" id="MathJax-Span-633"><span style="font-family: STIXGeneral, &quot;Arial Unicode MS&quot;, serif; font-size: 79%; font-style: normal; font-weight: normal;">后</span></span></span></span><span class="texatom" id="MathJax-Span-634"><span class="mrow" id="MathJax-Span-635"><span class="mo" id="MathJax-Span-636"><span style="font-family: STIXGeneral, &quot;Arial Unicode MS&quot;, serif; font-size: 79%; font-style: normal; font-weight: normal;">一</span></span></span></span><span class="texatom" id="MathJax-Span-637"><span class="mrow" id="MathJax-Span-638"><span class="mo" id="MathJax-Span-639"><span style="font-family: STIXGeneral, &quot;Arial Unicode MS&quot;, serif; font-size: 79%; font-style: normal; font-weight: normal;">列</span></span></span></span><span class="texatom" id="MathJax-Span-640"><span class="mrow" id="MathJax-Span-641"><span class="mo" id="MathJax-Span-642"><span style="font-family: STIXGeneral, &quot;Arial Unicode MS&quot;, serif; font-size: 79%; font-style: normal; font-weight: normal;">展</span></span></span></span><span class="texatom" id="MathJax-Span-643"><span class="mrow" id="MathJax-Span-644"><span class="mo" id="MathJax-Span-645"><span style="font-family: STIXGeneral, &quot;Arial Unicode MS&quot;, serif; font-size: 79%; font-style: normal; font-weight: normal;">开</span></span></span></span><span class="mo" id="MathJax-Span-646" style="font-family: MathJax_Main;">)</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(4.264em 1025.26em 11.903em -1000em); top: -2.05em; left: 0em;"><span class="mtd" id="MathJax-Span-649"><span class="mrow" id="MathJax-Span-650"><span class="mi" id="MathJax-Span-651"></span><span class="mo" id="MathJax-Span-652" style="font-family: MathJax_Main; padding-left: 0.278em;">=</span><span class="mrow" id="MathJax-Span-653" style="padding-left: 0.278em;"><span class="mo" id="MathJax-Span-654" style="vertical-align: 3.92em;"><span style="display: inline-block; position: relative; width: 0.278em; height: 0px;"><span style="position: absolute; font-family: MathJax_Main; top: -3.268em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; font-family: MathJax_Main; top: 3.074em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: -2.362em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: -1.456em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: -0.55em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: 0.356em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: 1.262em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: 2.168em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span><span class="mtable" id="MathJax-Span-655" style="padding-right: 0.167em; padding-left: 0.167em;"><span style="display: inline-block; position: relative; width: 16.128em; height: 0px;"><span style="position: absolute; clip: rect(4.084em 1002.77em 11.323em -1000em); top: -7.937em; left: 0em;"><span style="display: inline-block; position: relative; width: 2.822em; height: 0px;"><span style="position: absolute; clip: rect(3.286em 1002.77em 4.324em -1000em); top: -7.138em; left: 50%; margin-left: -1.411em;"><span class="mtd" id="MathJax-Span-656"><span class="mrow" id="MathJax-Span-657"><span class="msubsup" id="MathJax-Span-658"><span style="display: inline-block; position: relative; width: 1.028em; height: 0px;"><span style="position: absolute; clip: rect(3.428em 1000.51em 4.177em -1000em); top: -4.018em; left: 0em;"><span class="mi" id="MathJax-Span-659" style="font-family: MathJax_Math-italic;">a</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; top: -3.868em; left: 0.529em;"><span class="mi" id="MathJax-Span-660" style="font-size: 70.7%; font-family: MathJax_Math-italic;">n</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span><span class="mo" id="MathJax-Span-661" style="font-family: MathJax_Main; padding-left: 0.222em;">−</span><span class="mi" id="MathJax-Span-662" style="font-family: MathJax_Math-italic; padding-left: 0.222em;">x</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.286em 1002.24em 4.372em -1000em); top: -5.738em; left: 50%; margin-left: -1.145em;"><span class="mtd" id="MathJax-Span-675"><span class="mrow" id="MathJax-Span-676"><span class="mi" id="MathJax-Span-677" style="font-family: MathJax_Math-italic;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span><span class="mo" id="MathJax-Span-678" style="font-family: MathJax_Main; padding-left: 0.222em;">−</span><span class="mi" id="MathJax-Span-679" style="font-family: MathJax_Math-italic; padding-left: 0.222em;">x</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.286em 1002.24em 4.372em -1000em); top: -4.33em; left: 50%; margin-left: -1.145em;"><span class="mtd" id="MathJax-Span-700"><span class="mrow" id="MathJax-Span-701"><span class="mi" id="MathJax-Span-702" style="font-family: MathJax_Math-italic;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span><span class="mo" id="MathJax-Span-703" style="font-family: MathJax_Main; padding-left: 0.222em;">−</span><span class="mi" id="MathJax-Span-704" style="font-family: MathJax_Math-italic; padding-left: 0.222em;">x</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(2.569em 1000.2em 4.197em -1000em); top: -2.202em; left: 50%; margin-left: -0.139em;"><span class="mtd" id="MathJax-Span-727"><span class="mrow" id="MathJax-Span-728"><span class="mo" id="MathJax-Span-729" style="font-family: MathJax_Main;">⋮</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.203em 1000.46em 4.189em -1000em); top: -0.802em; left: 50%; margin-left: -0.25em;"><span class="mtd" id="MathJax-Span-742"><span class="mrow" id="MathJax-Span-743"><span class="mn" id="MathJax-Span-744" style="font-family: MathJax_Main;">0</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span><span style="display: inline-block; width: 0px; height: 7.937em;"></span></span><span style="position: absolute; clip: rect(4.1em 1003.68em 11.422em -1000em); top: -8.036em; left: 3.822em;"><span style="display: inline-block; position: relative; width: 3.726em; height: 0px;"><span style="position: absolute; clip: rect(3.203em 1000.46em 4.189em -1000em); top: -7.138em; left: 50%; margin-left: -0.25em;"><span class="mtd" id="MathJax-Span-663"><span class="mrow" id="MathJax-Span-664"><span class="mn" id="MathJax-Span-665" style="font-family: MathJax_Main;">0</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.286em 1003.68em 4.375em -1000em); top: -5.738em; left: 50%; margin-left: -1.863em;"><span class="mtd" id="MathJax-Span-680"><span class="mrow" id="MathJax-Span-681"><span class="msubsup" id="MathJax-Span-682"><span style="display: inline-block; position: relative; width: 1.932em; height: 0px;"><span style="position: absolute; clip: rect(3.428em 1000.51em 4.177em -1000em); top: -4.018em; left: 0em;"><span class="mi" id="MathJax-Span-683" style="font-family: MathJax_Math-italic;">a</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; top: -3.868em; left: 0.529em;"><span class="texatom" id="MathJax-Span-684"><span class="mrow" id="MathJax-Span-685"><span class="mi" id="MathJax-Span-686" style="font-size: 70.7%; font-family: MathJax_Math-italic;">n</span><span class="mo" id="MathJax-Span-687" style="font-size: 70.7%; font-family: MathJax_Main;">−</span><span class="mn" id="MathJax-Span-688" style="font-size: 70.7%; font-family: MathJax_Main;">1</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span><span class="mo" id="MathJax-Span-689" style="font-family: MathJax_Main; padding-left: 0.222em;">−</span><span class="mi" id="MathJax-Span-690" style="font-family: MathJax_Math-italic; padding-left: 0.222em;">x</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.286em 1002.24em 4.372em -1000em); top: -4.33em; left: 50%; margin-left: -1.145em;"><span class="mtd" id="MathJax-Span-705"><span class="mrow" id="MathJax-Span-706"><span class="mi" id="MathJax-Span-707" style="font-family: MathJax_Math-italic;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span><span class="mo" id="MathJax-Span-708" style="font-family: MathJax_Main; padding-left: 0.222em;">−</span><span class="mi" id="MathJax-Span-709" style="font-family: MathJax_Math-italic; padding-left: 0.222em;">x</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(2.569em 1000.2em 4.197em -1000em); top: -2.202em; left: 50%; margin-left: -0.139em;"><span class="mtd" id="MathJax-Span-730"><span class="mrow" id="MathJax-Span-731"><span class="mo" id="MathJax-Span-732" style="font-family: MathJax_Main;">⋮</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.203em 1000.46em 4.189em -1000em); top: -0.802em; left: 50%; margin-left: -0.25em;"><span class="mtd" id="MathJax-Span-745"><span class="mrow" id="MathJax-Span-746"><span class="mn" id="MathJax-Span-747" style="font-family: MathJax_Main;">0</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span><span style="display: inline-block; width: 0px; height: 8.036em;"></span></span><span style="position: absolute; clip: rect(4.1em 1003.68em 11.422em -1000em); top: -8.036em; left: 8.548em;"><span style="display: inline-block; position: relative; width: 3.726em; height: 0px;"><span style="position: absolute; clip: rect(3.203em 1000.46em 4.189em -1000em); top: -7.138em; left: 50%; margin-left: -0.25em;"><span class="mtd" id="MathJax-Span-666"><span class="mrow" id="MathJax-Span-667"><span class="mn" id="MathJax-Span-668" style="font-family: MathJax_Main;">0</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.203em 1000.46em 4.189em -1000em); top: -5.738em; left: 50%; margin-left: -0.25em;"><span class="mtd" id="MathJax-Span-691"><span class="mrow" id="MathJax-Span-692"><span class="mn" id="MathJax-Span-693" style="font-family: MathJax_Main;">0</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.286em 1003.68em 4.375em -1000em); top: -4.33em; left: 50%; margin-left: -1.863em;"><span class="mtd" id="MathJax-Span-710"><span class="mrow" id="MathJax-Span-711"><span class="msubsup" id="MathJax-Span-712"><span style="display: inline-block; position: relative; width: 1.932em; height: 0px;"><span style="position: absolute; clip: rect(3.428em 1000.51em 4.177em -1000em); top: -4.018em; left: 0em;"><span class="mi" id="MathJax-Span-713" style="font-family: MathJax_Math-italic;">a</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; top: -3.868em; left: 0.529em;"><span class="texatom" id="MathJax-Span-714"><span class="mrow" id="MathJax-Span-715"><span class="mi" id="MathJax-Span-716" style="font-size: 70.7%; font-family: MathJax_Math-italic;">n</span><span class="mo" id="MathJax-Span-717" style="font-size: 70.7%; font-family: MathJax_Main;">−</span><span class="mn" id="MathJax-Span-718" style="font-size: 70.7%; font-family: MathJax_Main;">2</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span><span class="mo" id="MathJax-Span-719" style="font-family: MathJax_Main; padding-left: 0.222em;">−</span><span class="mi" id="MathJax-Span-720" style="font-family: MathJax_Math-italic; padding-left: 0.222em;">x</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(2.569em 1000.2em 4.197em -1000em); top: -2.202em; left: 50%; margin-left: -0.139em;"><span class="mtd" id="MathJax-Span-733"><span class="mrow" id="MathJax-Span-734"><span class="mo" id="MathJax-Span-735" style="font-family: MathJax_Main;">⋮</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.203em 1000.46em 4.189em -1000em); top: -0.802em; left: 50%; margin-left: -0.25em;"><span class="mtd" id="MathJax-Span-748"><span class="mrow" id="MathJax-Span-749"><span class="mn" id="MathJax-Span-750" style="font-family: MathJax_Main;">0</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span><span style="display: inline-block; width: 0px; height: 8.036em;"></span></span><span style="position: absolute; clip: rect(3.861em 1001.15em 10.615em -1000em); top: -7.44em; left: 13.274em;"><span style="display: inline-block; position: relative; width: 1.282em; height: 0px;"><span style="position: absolute; clip: rect(3.559em 1001.09em 3.977em -1000em); top: -7.138em; left: 50%; margin-left: -0.586em;"><span class="mtd" id="MathJax-Span-669"><span class="mrow" id="MathJax-Span-670"><span class="mo" id="MathJax-Span-671" style="font-family: MathJax_Main;">⋯</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.559em 1001.09em 3.977em -1000em); top: -5.738em; left: 50%; margin-left: -0.586em;"><span class="mtd" id="MathJax-Span-694"><span class="mrow" id="MathJax-Span-695"><span class="mo" id="MathJax-Span-696" style="font-family: MathJax_Main;">⋯</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.559em 1001.09em 3.977em -1000em); top: -4.33em; left: 50%; margin-left: -0.586em;"><span class="mtd" id="MathJax-Span-721"><span class="mrow" id="MathJax-Span-722"><span class="mo" id="MathJax-Span-723" style="font-family: MathJax_Main;">⋯</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(2.349em 1001.15em 4.067em -1000em); top: -2.202em; left: 50%; margin-left: -0.641em;"><span class="mtd" id="MathJax-Span-736"><span class="mrow" id="MathJax-Span-737"><span class="mo" id="MathJax-Span-738" style="font-family: MathJax_Main;">⋱</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.559em 1001.09em 3.977em -1000em); top: -0.802em; left: 50%; margin-left: -0.586em;"><span class="mtd" id="MathJax-Span-751"><span class="mrow" id="MathJax-Span-752"><span class="mo" id="MathJax-Span-753" style="font-family: MathJax_Main;">⋯</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span><span style="display: inline-block; width: 0px; height: 7.44em;"></span></span><span style="position: absolute; clip: rect(4.275em 1000.52em 11.555em -1000em); top: -7.986em; left: 15.556em;"><span style="display: inline-block; position: relative; width: 0.572em; height: 0px;"><span style="position: absolute; clip: rect(3.427em 1000.52em 4.178em -1000em); top: -7.138em; left: 50%; margin-left: -0.286em;"><span class="mtd" id="MathJax-Span-672"><span class="mrow" id="MathJax-Span-673"><span class="mi" id="MathJax-Span-674" style="font-family: MathJax_Math-italic;">x</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.427em 1000.52em 4.178em -1000em); top: -5.738em; left: 50%; margin-left: -0.286em;"><span class="mtd" id="MathJax-Span-697"><span class="mrow" id="MathJax-Span-698"><span class="mi" id="MathJax-Span-699" style="font-family: MathJax_Math-italic;">x</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.427em 1000.52em 4.178em -1000em); top: -4.33em; left: 50%; margin-left: -0.286em;"><span class="mtd" id="MathJax-Span-724"><span class="mrow" id="MathJax-Span-725"><span class="mi" id="MathJax-Span-726" style="font-family: MathJax_Math-italic;">x</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(2.569em 1000.2em 4.197em -1000em); top: -2.202em; left: 50%; margin-left: -0.139em;"><span class="mtd" id="MathJax-Span-739"><span class="mrow" id="MathJax-Span-740"><span class="mo" id="MathJax-Span-741" style="font-family: MathJax_Main;">⋮</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.427em 1000.5em 4.372em -1000em); top: -0.802em; left: 50%; margin-left: -0.248em;"><span class="mtd" id="MathJax-Span-754"><span class="mrow" id="MathJax-Span-755"><span class="mi" id="MathJax-Span-756" style="font-family: MathJax_Math-italic;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span><span style="display: inline-block; width: 0px; height: 7.986em;"></span></span></span></span><span class="mo" id="MathJax-Span-757" style="vertical-align: 3.92em;"><span style="display: inline-block; position: relative; width: 0.278em; height: 0px;"><span style="position: absolute; font-family: MathJax_Main; top: -3.268em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; font-family: MathJax_Main; top: 3.074em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: -2.362em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: -1.456em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: -0.55em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: 0.356em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: 1.262em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: 2.168em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span></span><span class="mo" id="MathJax-Span-758" style="font-family: MathJax_Main; padding-left: 0.222em;">+</span><span class="mo" id="MathJax-Span-759" style="font-family: MathJax_Main; padding-left: 0.222em;">(</span><span class="msubsup" id="MathJax-Span-760"><span style="display: inline-block; position: relative; width: 0.958em; height: 0px;"><span style="position: absolute; clip: rect(3.428em 1000.51em 4.177em -1000em); top: -4.018em; left: 0em;"><span class="mi" id="MathJax-Span-761" style="font-family: MathJax_Math-italic;">a</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; top: -3.868em; left: 0.529em;"><span class="mn" id="MathJax-Span-762" style="font-size: 70.7%; font-family: MathJax_Main;">1</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span><span class="mo" id="MathJax-Span-763" style="font-family: MathJax_Main; padding-left: 0.222em;">−</span><span class="mi" id="MathJax-Span-764" style="font-family: MathJax_Math-italic; padding-left: 0.222em;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span><span class="mo" id="MathJax-Span-765" style="font-family: MathJax_Main;">)</span><span class="msubsup" id="MathJax-Span-766"><span style="display: inline-block; position: relative; width: 2.231em; height: 0px;"><span style="position: absolute; clip: rect(3.186em 1000.8em 4.167em -1000em); top: -4.018em; left: 0em;"><span class="mi" id="MathJax-Span-767" style="font-family: MathJax_Math-italic;">D</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; top: -3.868em; left: 0.828em;"><span class="texatom" id="MathJax-Span-768"><span class="mrow" id="MathJax-Span-769"><span class="mi" id="MathJax-Span-770" style="font-size: 70.7%; font-family: MathJax_Math-italic;">n</span><span class="mo" id="MathJax-Span-771" style="font-size: 70.7%; font-family: MathJax_Main;">−</span><span class="mn" id="MathJax-Span-772" style="font-size: 70.7%; font-family: MathJax_Main;">1</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span></span></span><span style="display: inline-block; width: 0px; height: 8.333em;"></span></span><span style="position: absolute; clip: rect(3.119em 1020.9em 4.417em -1000em); top: 6.786em; left: 0em;"><span class="mtd" id="MathJax-Span-778"><span class="mrow" id="MathJax-Span-779"><span class="mi" id="MathJax-Span-780"></span><span class="mo" id="MathJax-Span-781" style="font-family: MathJax_Main; padding-left: 0.278em;">=</span><span class="mi" id="MathJax-Span-782" style="font-family: MathJax_Math-italic; padding-left: 0.278em;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span><span class="mo" id="MathJax-Span-783" style="font-family: MathJax_Main;">(</span><span class="msubsup" id="MathJax-Span-784"><span style="display: inline-block; position: relative; width: 0.958em; height: 0px;"><span style="position: absolute; clip: rect(3.428em 1000.51em 4.177em -1000em); top: -4.018em; left: 0em;"><span class="mi" id="MathJax-Span-785" style="font-family: MathJax_Math-italic;">a</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; top: -3.868em; left: 0.529em;"><span class="mn" id="MathJax-Span-786" style="font-size: 70.7%; font-family: MathJax_Main;">2</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span><span class="mo" id="MathJax-Span-787" style="font-family: MathJax_Main; padding-left: 0.222em;">−</span><span class="mi" id="MathJax-Span-788" style="font-family: MathJax_Math-italic; padding-left: 0.222em;">x</span><span class="mo" id="MathJax-Span-789" style="font-family: MathJax_Main;">)</span><span class="mo" id="MathJax-Span-790" style="font-family: MathJax_Main;">(</span><span class="msubsup" id="MathJax-Span-791"><span style="display: inline-block; position: relative; width: 0.958em; height: 0px;"><span style="position: absolute; clip: rect(3.428em 1000.51em 4.177em -1000em); top: -4.018em; left: 0em;"><span class="mi" id="MathJax-Span-792" style="font-family: MathJax_Math-italic;">a</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; top: -3.868em; left: 0.529em;"><span class="mn" id="MathJax-Span-793" style="font-size: 70.7%; font-family: MathJax_Main;">3</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span><span class="mo" id="MathJax-Span-794" style="font-family: MathJax_Main; padding-left: 0.222em;">−</span><span class="mi" id="MathJax-Span-795" style="font-family: MathJax_Math-italic; padding-left: 0.222em;">x</span><span class="mo" id="MathJax-Span-796" style="font-family: MathJax_Main;">)</span><span class="mo" id="MathJax-Span-797" style="font-family: MathJax_Main; padding-left: 0.167em;">⋯</span><span class="mo" id="MathJax-Span-798" style="font-family: MathJax_Main; padding-left: 0.167em;">(</span><span class="msubsup" id="MathJax-Span-799"><span style="display: inline-block; position: relative; width: 1.028em; height: 0px;"><span style="position: absolute; clip: rect(3.428em 1000.51em 4.177em -1000em); top: -4.018em; left: 0em;"><span class="mi" id="MathJax-Span-800" style="font-family: MathJax_Math-italic;">a</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; top: -3.868em; left: 0.529em;"><span class="mi" id="MathJax-Span-801" style="font-size: 70.7%; font-family: MathJax_Math-italic;">n</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span><span class="mo" id="MathJax-Span-802" style="font-family: MathJax_Main; padding-left: 0.222em;">−</span><span class="mi" id="MathJax-Span-803" style="font-family: MathJax_Math-italic; padding-left: 0.222em;">x</span><span class="mo" id="MathJax-Span-804" style="font-family: MathJax_Main;">)</span><span class="mo" id="MathJax-Span-805" style="font-family: MathJax_Main; padding-left: 0.222em;">+</span><span class="mo" id="MathJax-Span-806" style="font-family: MathJax_Main; padding-left: 0.222em;">(</span><span class="msubsup" id="MathJax-Span-807"><span style="display: inline-block; position: relative; width: 0.958em; height: 0px;"><span style="position: absolute; clip: rect(3.428em 1000.51em 4.177em -1000em); top: -4.018em; left: 0em;"><span class="mi" id="MathJax-Span-808" style="font-family: MathJax_Math-italic;">a</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; top: -3.868em; left: 0.529em;"><span class="mn" id="MathJax-Span-809" style="font-size: 70.7%; font-family: MathJax_Main;">1</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span><span class="mo" id="MathJax-Span-810" style="font-family: MathJax_Main; padding-left: 0.222em;">−</span><span class="mi" id="MathJax-Span-811" style="font-family: MathJax_Math-italic; padding-left: 0.222em;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span><span class="mo" id="MathJax-Span-812" style="font-family: MathJax_Main;">)</span><span class="msubsup" id="MathJax-Span-813"><span style="display: inline-block; position: relative; width: 2.231em; height: 0px;"><span style="position: absolute; clip: rect(3.186em 1000.8em 4.167em -1000em); top: -4.018em; left: 0em;"><span class="mi" id="MathJax-Span-814" style="font-family: MathJax_Math-italic;">D</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; top: -3.868em; left: 0.828em;"><span class="texatom" id="MathJax-Span-815"><span class="mrow" id="MathJax-Span-816"><span class="mi" id="MathJax-Span-817" style="font-size: 70.7%; font-family: MathJax_Math-italic;">n</span><span class="mo" id="MathJax-Span-818" style="font-size: 70.7%; font-family: MathJax_Main;">−</span><span class="mn" id="MathJax-Span-819" style="font-size: 70.7%; font-family: MathJax_Main;">1</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.119em 1020.83em 4.417em -1000em); top: 9.436em; left: 0em;"><span class="mtd" id="MathJax-Span-842"><span class="mrow" id="MathJax-Span-843"><span class="mi" id="MathJax-Span-844"></span><span class="mo" id="MathJax-Span-845" style="font-family: MathJax_Main; padding-left: 0.278em;">=</span><span class="mi" id="MathJax-Span-846" style="font-family: MathJax_Math-italic; padding-left: 0.278em;">x</span><span class="mo" id="MathJax-Span-847" style="font-family: MathJax_Main;">(</span><span class="msubsup" id="MathJax-Span-848"><span style="display: inline-block; position: relative; width: 0.958em; height: 0px;"><span style="position: absolute; clip: rect(3.428em 1000.51em 4.177em -1000em); top: -4.018em; left: 0em;"><span class="mi" id="MathJax-Span-849" style="font-family: MathJax_Math-italic;">a</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; top: -3.868em; left: 0.529em;"><span class="mn" id="MathJax-Span-850" style="font-size: 70.7%; font-family: MathJax_Main;">2</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span><span class="mo" id="MathJax-Span-851" style="font-family: MathJax_Main; padding-left: 0.222em;">−</span><span class="mi" id="MathJax-Span-852" style="font-family: MathJax_Math-italic; padding-left: 0.222em;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span><span class="mo" id="MathJax-Span-853" style="font-family: MathJax_Main;">)</span><span class="mo" id="MathJax-Span-854" style="font-family: MathJax_Main;">(</span><span class="msubsup" id="MathJax-Span-855"><span style="display: inline-block; position: relative; width: 0.958em; height: 0px;"><span style="position: absolute; clip: rect(3.428em 1000.51em 4.177em -1000em); top: -4.018em; left: 0em;"><span class="mi" id="MathJax-Span-856" style="font-family: MathJax_Math-italic;">a</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; top: -3.868em; left: 0.529em;"><span class="mn" id="MathJax-Span-857" style="font-size: 70.7%; font-family: MathJax_Main;">3</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span><span class="mo" id="MathJax-Span-858" style="font-family: MathJax_Main; padding-left: 0.222em;">−</span><span class="mi" id="MathJax-Span-859" style="font-family: MathJax_Math-italic; padding-left: 0.222em;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span><span class="mo" id="MathJax-Span-860" style="font-family: MathJax_Main;">)</span><span class="mo" id="MathJax-Span-861" style="font-family: MathJax_Main; padding-left: 0.167em;">⋯</span><span class="mo" id="MathJax-Span-862" style="font-family: MathJax_Main; padding-left: 0.167em;">(</span><span class="msubsup" id="MathJax-Span-863"><span style="display: inline-block; position: relative; width: 1.028em; height: 0px;"><span style="position: absolute; clip: rect(3.428em 1000.51em 4.177em -1000em); top: -4.018em; left: 0em;"><span class="mi" id="MathJax-Span-864" style="font-family: MathJax_Math-italic;">a</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; top: -3.868em; left: 0.529em;"><span class="mi" id="MathJax-Span-865" style="font-size: 70.7%; font-family: MathJax_Math-italic;">n</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span><span class="mo" id="MathJax-Span-866" style="font-family: MathJax_Main; padding-left: 0.222em;">−</span><span class="mi" id="MathJax-Span-867" style="font-family: MathJax_Math-italic; padding-left: 0.222em;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span><span class="mo" id="MathJax-Span-868" style="font-family: MathJax_Main;">)</span><span class="mo" id="MathJax-Span-869" style="font-family: MathJax_Main; padding-left: 0.222em;">+</span><span class="mo" id="MathJax-Span-870" style="font-family: MathJax_Main; padding-left: 0.222em;">(</span><span class="msubsup" id="MathJax-Span-871"><span style="display: inline-block; position: relative; width: 0.958em; height: 0px;"><span style="position: absolute; clip: rect(3.428em 1000.51em 4.177em -1000em); top: -4.018em; left: 0em;"><span class="mi" id="MathJax-Span-872" style="font-family: MathJax_Math-italic;">a</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; top: -3.868em; left: 0.529em;"><span class="mn" id="MathJax-Span-873" style="font-size: 70.7%; font-family: MathJax_Main;">1</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span><span class="mo" id="MathJax-Span-874" style="font-family: MathJax_Main; padding-left: 0.222em;">−</span><span class="mi" id="MathJax-Span-875" style="font-family: MathJax_Math-italic; padding-left: 0.222em;">x</span><span class="mo" id="MathJax-Span-876" style="font-family: MathJax_Main;">)</span><span class="msubsup" id="MathJax-Span-877"><span style="display: inline-block; position: relative; width: 2.231em; height: 0px;"><span style="position: absolute; clip: rect(3.186em 1000.8em 4.167em -1000em); top: -4.018em; left: 0em;"><span class="mi" id="MathJax-Span-878" style="font-family: MathJax_Math-italic;">D</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; top: -3.868em; left: 0.828em;"><span class="texatom" id="MathJax-Span-879"><span class="mrow" id="MathJax-Span-880"><span class="mi" id="MathJax-Span-881" style="font-size: 70.7%; font-family: MathJax_Math-italic;">n</span><span class="mo" id="MathJax-Span-882" style="font-size: 70.7%; font-family: MathJax_Main;">−</span><span class="mn" id="MathJax-Span-883" style="font-size: 70.7%; font-family: MathJax_Main;">1</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.069em 1011.21em 4.417em -1000em); top: 10.786em; left: 0em;"><span class="mtd" id="MathJax-Span-890"><span class="mrow" id="MathJax-Span-891"><span class="mi" id="MathJax-Span-892"></span><span class="mo" id="MathJax-Span-893" style="font-family: MathJax_Main;">(</span><span class="msubsup" id="MathJax-Span-894"><span style="display: inline-block; position: relative; width: 0.958em; height: 0px;"><span style="position: absolute; clip: rect(3.428em 1000.51em 4.177em -1000em); top: -4.018em; left: 0em;"><span class="mi" id="MathJax-Span-895" style="font-family: MathJax_Math-italic;">a</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; top: -3.868em; left: 0.529em;"><span class="mn" id="MathJax-Span-896" style="font-size: 70.7%; font-family: MathJax_Main;">1</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span><span class="mo" id="MathJax-Span-897" style="font-family: MathJax_Main; padding-left: 0.222em;">−</span><span class="mi" id="MathJax-Span-898" style="font-family: MathJax_Math-italic; padding-left: 0.222em;">x</span><span class="mo" id="MathJax-Span-899" style="font-family: MathJax_Main;">)</span><span class="mo" id="MathJax-Span-900" style="font-family: MathJax_Main; padding-left: 0.222em;">−</span><span class="mo" id="MathJax-Span-901" style="font-family: MathJax_Main; padding-left: 0.222em;">(</span><span class="mn" id="MathJax-Span-902" style="font-family: MathJax_Main;">2</span><span class="mo" id="MathJax-Span-903" style="font-family: MathJax_Main;">)</span><span class="mo" id="MathJax-Span-904" style="font-family: MathJax_Main; padding-left: 0.222em;">×</span><span class="mo" id="MathJax-Span-905" style="font-family: MathJax_Main; padding-left: 0.222em;">(</span><span class="msubsup" id="MathJax-Span-906"><span style="display: inline-block; position: relative; width: 0.958em; height: 0px;"><span style="position: absolute; clip: rect(3.428em 1000.51em 4.177em -1000em); top: -4.018em; left: 0em;"><span class="mi" id="MathJax-Span-907" style="font-family: MathJax_Math-italic;">a</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; top: -3.868em; left: 0.529em;"><span class="mn" id="MathJax-Span-908" style="font-size: 70.7%; font-family: MathJax_Main;">1</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span><span class="mo" id="MathJax-Span-909" style="font-family: MathJax_Main; padding-left: 0.222em;">−</span><span class="mi" id="MathJax-Span-910" style="font-family: MathJax_Math-italic; padding-left: 0.222em;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span><span class="mo" id="MathJax-Span-911" style="font-family: MathJax_Main;">)</span><span class="texatom" id="MathJax-Span-912"><span class="mrow" id="MathJax-Span-913"><span class="mo" id="MathJax-Span-914"><span style="font-family: STIXGeneral, &quot;Arial Unicode MS&quot;, serif; font-size: 79%; font-style: normal; font-weight: normal;">得</span></span></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(2.307em 1017.58em 5.362em -1000em); top: 12.898em; left: 0em;"><span class="mtd" id="MathJax-Span-917"><span class="mrow" id="MathJax-Span-918"><span class="mi" id="MathJax-Span-919"></span><span class="mo" id="MathJax-Span-920" style="font-family: MathJax_Main;">(</span><span class="mi" id="MathJax-Span-921" style="font-family: MathJax_Math-italic;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span><span class="mo" id="MathJax-Span-922" style="font-family: MathJax_Main; padding-left: 0.222em;">−</span><span class="mi" id="MathJax-Span-923" style="font-family: MathJax_Math-italic; padding-left: 0.222em;">x</span><span class="mo" id="MathJax-Span-924" style="font-family: MathJax_Main;">)</span><span class="msubsup" id="MathJax-Span-925"><span style="display: inline-block; position: relative; width: 1.327em; height: 0px;"><span style="position: absolute; clip: rect(3.186em 1000.8em 4.167em -1000em); top: -4.018em; left: 0em;"><span class="mi" id="MathJax-Span-926" style="font-family: MathJax_Math-italic;">D</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; top: -3.868em; left: 0.828em;"><span class="mi" id="MathJax-Span-927" style="font-size: 70.7%; font-family: MathJax_Math-italic;">n</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span><span class="mo" id="MathJax-Span-928" style="font-family: MathJax_Main; padding-left: 0.278em;">=</span><span class="mi" id="MathJax-Span-929" style="font-family: MathJax_Math-italic; padding-left: 0.278em;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span><span class="munderover" id="MathJax-Span-930" style="padding-left: 0.167em;"><span style="display: inline-block; position: relative; width: 1.278em; height: 0px;"><span style="position: absolute; clip: rect(2.919em 1001.22em 4.617em -1000em); top: -4.018em; left: 0em;"><span class="mo" id="MathJax-Span-931" style="font-family: MathJax_Size2; vertical-align: 0em;">∏</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.398em 1001.1em 4.274em -1000em); top: -2.93em; left: 0.065em;"><span class="texatom" id="MathJax-Span-932"><span class="mrow" id="MathJax-Span-933"><span class="mi" id="MathJax-Span-934" style="font-size: 70.7%; font-family: MathJax_Math-italic;">i</span><span class="mo" id="MathJax-Span-935" style="font-size: 70.7%; font-family: MathJax_Main;">=</span><span class="mn" id="MathJax-Span-936" style="font-size: 70.7%; font-family: MathJax_Main;">1</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.457em 1000.41em 4.174em -1000em); top: -5.168em; left: 0.427em;"><span class="mi" id="MathJax-Span-937" style="font-size: 70.7%; font-family: MathJax_Math-italic;">n</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span><span class="mo" id="MathJax-Span-938" style="font-family: MathJax_Main;">(</span><span class="msubsup" id="MathJax-Span-939"><span style="display: inline-block; position: relative; width: 0.848em; height: 0px;"><span style="position: absolute; clip: rect(3.428em 1000.51em 4.177em -1000em); top: -4.018em; left: 0em;"><span class="mi" id="MathJax-Span-940" style="font-family: MathJax_Math-italic;">a</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; top: -3.868em; left: 0.529em;"><span class="mi" id="MathJax-Span-941" style="font-size: 70.7%; font-family: MathJax_Math-italic;">i</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span><span class="mo" id="MathJax-Span-942" style="font-family: MathJax_Main; padding-left: 0.222em;">−</span><span class="mi" id="MathJax-Span-943" style="font-family: MathJax_Math-italic; padding-left: 0.222em;">x</span><span class="mo" id="MathJax-Span-944" style="font-family: MathJax_Main;">)</span><span class="mo" id="MathJax-Span-945" style="font-family: MathJax_Main; padding-left: 0.222em;">−</span><span class="mi" id="MathJax-Span-946" style="font-family: MathJax_Math-italic; padding-left: 0.222em;">x</span><span class="munderover" id="MathJax-Span-947" style="padding-left: 0.167em;"><span style="display: inline-block; position: relative; width: 1.278em; height: 0px;"><span style="position: absolute; clip: rect(2.919em 1001.22em 4.617em -1000em); top: -4.018em; left: 0em;"><span class="mo" id="MathJax-Span-948" style="font-family: MathJax_Size2; vertical-align: 0em;">∏</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.398em 1001.1em 4.274em -1000em); top: -2.93em; left: 0.065em;"><span class="texatom" id="MathJax-Span-949"><span class="mrow" id="MathJax-Span-950"><span class="mi" id="MathJax-Span-951" style="font-size: 70.7%; font-family: MathJax_Math-italic;">i</span><span class="mo" id="MathJax-Span-952" style="font-size: 70.7%; font-family: MathJax_Main;">=</span><span class="mn" id="MathJax-Span-953" style="font-size: 70.7%; font-family: MathJax_Main;">1</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.457em 1000.41em 4.174em -1000em); top: -5.168em; left: 0.427em;"><span class="mi" id="MathJax-Span-954" style="font-size: 70.7%; font-family: MathJax_Math-italic;">n</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span><span class="mo" id="MathJax-Span-955" style="font-family: MathJax_Main;">(</span><span class="msubsup" id="MathJax-Span-956"><span style="display: inline-block; position: relative; width: 0.848em; height: 0px;"><span style="position: absolute; clip: rect(3.428em 1000.51em 4.177em -1000em); top: -4.018em; left: 0em;"><span class="mi" id="MathJax-Span-957" style="font-family: MathJax_Math-italic;">a</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; top: -3.868em; left: 0.529em;"><span class="mi" id="MathJax-Span-958" style="font-size: 70.7%; font-family: MathJax_Math-italic;">i</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span><span class="mo" id="MathJax-Span-959" style="font-family: MathJax_Main; padding-left: 0.222em;">−</span><span class="mi" id="MathJax-Span-960" style="font-family: MathJax_Math-italic; padding-left: 0.222em;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span><span class="mo" id="MathJax-Span-961" style="font-family: MathJax_Main;">)</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(2.12em 1018.15em 5.416em -1000em); top: 16.143em; left: 0em;"><span class="mtd" id="MathJax-Span-967"><span class="mrow" id="MathJax-Span-968"><span class="msubsup" id="MathJax-Span-969"><span style="display: inline-block; position: relative; width: 1.327em; height: 0px;"><span style="position: absolute; clip: rect(3.186em 1000.8em 4.167em -1000em); top: -4.018em; left: 0em;"><span class="mi" id="MathJax-Span-970" style="font-family: MathJax_Math-italic;">D</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; top: -3.868em; left: 0.828em;"><span class="mi" id="MathJax-Span-971" style="font-size: 70.7%; font-family: MathJax_Math-italic;">n</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span><span class="mo" id="MathJax-Span-972" style="font-family: MathJax_Main; padding-left: 0.278em;">=</span><span class="mfrac" id="MathJax-Span-973" style="padding-left: 0.278em;"><span style="display: inline-block; position: relative; width: 2.41em; height: 0px; margin-right: 0.12em; margin-left: 0.12em;"><span style="position: absolute; clip: rect(3.203em 1000.43em 4.167em -1000em); top: -4.694em; left: 50%; margin-left: -0.25em;"><span class="mn" id="MathJax-Span-974" style="font-family: MathJax_Main;">1</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.286em 1002.24em 4.372em -1000em); top: -3.332em; left: 50%; margin-left: -1.145em;"><span class="mrow" id="MathJax-Span-975"><span class="mi" id="MathJax-Span-976" style="font-family: MathJax_Math-italic;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span><span class="mo" id="MathJax-Span-977" style="font-family: MathJax_Main; padding-left: 0.222em;">−</span><span class="mi" id="MathJax-Span-978" style="font-family: MathJax_Math-italic; padding-left: 0.222em;">x</span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(0.831em 1002.41em 1.19em -1000em); top: -1.262em; left: 0em;"><span style="display: inline-block; overflow: hidden; vertical-align: 0em; border-top: 1.3px solid; width: 2.41em; height: 0px;"></span><span style="display: inline-block; width: 0px; height: 1.042em;"></span></span></span></span><span class="mrow" id="MathJax-Span-979"><span class="mo" id="MathJax-Span-980" style="vertical-align: 0em;"><span style="font-family: MathJax_Size4;">[</span></span><span class="mrow" id="MathJax-Span-981"><span class="mi" id="MathJax-Span-982" style="font-family: MathJax_Math-italic;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span><span class="munderover" id="MathJax-Span-983" style="padding-left: 0.167em;"><span style="display: inline-block; position: relative; width: 1.278em; height: 0px;"><span style="position: absolute; clip: rect(2.919em 1001.22em 4.617em -1000em); top: -4.018em; left: 0em;"><span class="mo" id="MathJax-Span-984" style="font-family: MathJax_Size2; vertical-align: 0em;">∏</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.398em 1001.1em 4.274em -1000em); top: -2.93em; left: 0.065em;"><span class="texatom" id="MathJax-Span-985"><span class="mrow" id="MathJax-Span-986"><span class="mi" id="MathJax-Span-987" style="font-size: 70.7%; font-family: MathJax_Math-italic;">i</span><span class="mo" id="MathJax-Span-988" style="font-size: 70.7%; font-family: MathJax_Main;">=</span><span class="mn" id="MathJax-Span-989" style="font-size: 70.7%; font-family: MathJax_Main;">1</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.457em 1000.41em 4.174em -1000em); top: -5.168em; left: 0.427em;"><span class="mi" id="MathJax-Span-990" style="font-size: 70.7%; font-family: MathJax_Math-italic;">n</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span><span class="mo" id="MathJax-Span-991" style="font-family: MathJax_Main;">(</span><span class="msubsup" id="MathJax-Span-992"><span style="display: inline-block; position: relative; width: 0.848em; height: 0px;"><span style="position: absolute; clip: rect(3.428em 1000.51em 4.177em -1000em); top: -4.018em; left: 0em;"><span class="mi" id="MathJax-Span-993" style="font-family: MathJax_Math-italic;">a</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; top: -3.868em; left: 0.529em;"><span class="mi" id="MathJax-Span-994" style="font-size: 70.7%; font-family: MathJax_Math-italic;">i</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span><span class="mo" id="MathJax-Span-995" style="font-family: MathJax_Main; padding-left: 0.222em;">−</span><span class="mi" id="MathJax-Span-996" style="font-family: MathJax_Math-italic; padding-left: 0.222em;">x</span><span class="mo" id="MathJax-Span-997" style="font-family: MathJax_Main;">)</span><span class="mo" id="MathJax-Span-998" style="font-family: MathJax_Main; padding-left: 0.222em;">−</span><span class="mi" id="MathJax-Span-999" style="font-family: MathJax_Math-italic; padding-left: 0.222em;">x</span><span class="munderover" id="MathJax-Span-1000" style="padding-left: 0.167em;"><span style="display: inline-block; position: relative; width: 1.278em; height: 0px;"><span style="position: absolute; clip: rect(2.919em 1001.22em 4.617em -1000em); top: -4.018em; left: 0em;"><span class="mo" id="MathJax-Span-1001" style="font-family: MathJax_Size2; vertical-align: 0em;">∏</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.398em 1001.1em 4.274em -1000em); top: -2.93em; left: 0.065em;"><span class="texatom" id="MathJax-Span-1002"><span class="mrow" id="MathJax-Span-1003"><span class="mi" id="MathJax-Span-1004" style="font-size: 70.7%; font-family: MathJax_Math-italic;">i</span><span class="mo" id="MathJax-Span-1005" style="font-size: 70.7%; font-family: MathJax_Main;">=</span><span class="mn" id="MathJax-Span-1006" style="font-size: 70.7%; font-family: MathJax_Main;">1</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.457em 1000.41em 4.174em -1000em); top: -5.168em; left: 0.427em;"><span class="mi" id="MathJax-Span-1007" style="font-size: 70.7%; font-family: MathJax_Math-italic;">n</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span><span class="mo" id="MathJax-Span-1008" style="font-family: MathJax_Main;">(</span><span class="msubsup" id="MathJax-Span-1009"><span style="display: inline-block; position: relative; width: 0.848em; height: 0px;"><span style="position: absolute; clip: rect(3.428em 1000.51em 4.177em -1000em); top: -4.018em; left: 0em;"><span class="mi" id="MathJax-Span-1010" style="font-family: MathJax_Math-italic;">a</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; top: -3.868em; left: 0.529em;"><span class="mi" id="MathJax-Span-1011" style="font-size: 70.7%; font-family: MathJax_Math-italic;">i</span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span><span class="mo" id="MathJax-Span-1012" style="font-family: MathJax_Main; padding-left: 0.222em;">−</span><span class="mi" id="MathJax-Span-1013" style="font-family: MathJax_Math-italic; padding-left: 0.222em;">y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.006em;"></span></span><span class="mo" id="MathJax-Span-1014" style="font-family: MathJax_Main;">)</span></span><span class="mo" id="MathJax-Span-1015" style="vertical-align: 0em;"><span style="font-family: MathJax_Size4;">]</span></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span><span style="display: inline-block; width: 0px; height: 44.345em;"></span></span></span><span style="display: inline-block; position: absolute; width: 1.278em; height: 0px; clip: rect(9.905em 1001.18em 13.852em -1000em); top: 0em; right: 0em; margin-right: 0em;"><span style="position: absolute; clip: rect(3.119em 1001.18em 4.417em -1000em); top: 6.786em; right: 0em;"><span class="mtd" id="mjx-eqn-1"><span class="mrow" id="MathJax-Span-774"><span class="mtext" id="MathJax-Span-775" style="font-family: MathJax_Main;">(1)</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span><span style="position: absolute; clip: rect(3.119em 1001.18em 4.417em -1000em); top: 9.436em; right: 0em;"><span class="mtd" id="mjx-eqn-2"><span class="mrow" id="MathJax-Span-835"><span class="mtext" id="MathJax-Span-836" style="font-family: MathJax_Main;">(2)</span></span></span><span style="display: inline-block; width: 0px; height: 4.018em;"></span></span></span></span></span><span style="display: inline-block; width: 0px; height: 44.345em;"></span></span></span></span><span style="display: inline-block; width: 0px; height: 53.571em;"></span></span></span><span style="display: inline-block; overflow: hidden; vertical-align: -61.364em; border-left: 0px solid; width: 0px; height: 66.367em;"></span></span></nobr><span class="MJX_Assistive_MathML MJX_Assistive_MathML_Block" role="presentation"><math xmlns="http://www.w3.org/1998/Math/MathML" display="block"><mrow class="MJX-TeXAtom-ORD"><mo>设</mo></mrow><msub><mi>D</mi><mi>n</mi></msub><mo>=</mo><mrow><mo>|</mo><mtable rowspacing="4pt" columnspacing="1em"><mtr><mtd><msub><mi>a</mi><mi>n</mi></msub></mtd><mtd><mi>x</mi></mtd><mtd><mi>x</mi></mtd><mtd><mo>⋯</mo></mtd><mtd><mi>x</mi></mtd></mtr><mtr><mtd><mi>y</mi></mtd><mtd><msub><mi>a</mi><mrow class="MJX-TeXAtom-ORD"><mi>n</mi><mo>−</mo><mn>1</mn></mrow></msub></mtd><mtd><mi>x</mi></mtd><mtd><mo>⋯</mo></mtd><mtd><mi>x</mi></mtd></mtr><mtr><mtd><mi>y</mi></mtd><mtd><mi>y</mi></mtd><mtd><msub><mi>a</mi><mrow class="MJX-TeXAtom-ORD"><mi>n</mi><mo>−</mo><mn>2</mn></mrow></msub></mtd><mtd><mo>⋯</mo></mtd><mtd><mi>x</mi></mtd></mtr><mtr><mtd><mo>⋮</mo></mtd><mtd><mo>⋮</mo></mtd><mtd><mo>⋮</mo></mtd><mtd><mo>⋱</mo></mtd><mtd><mo>⋮</mo></mtd></mtr><mtr><mtd><mi>y</mi></mtd><mtd><mi>y</mi></mtd><mtd><mi>y</mi></mtd><mtd><mo>⋯</mo></mtd><mtd><msub><mi>a</mi><mn>1</mn></msub></mtd></mtr></mtable><mo>|</mo></mrow><mspace linebreak="newline"></mspace><mrow class="MJX-TeXAtom-ORD"><mo>当</mo></mrow><mi>x</mi><mo>≠</mo><mi>y</mi><mrow class="MJX-TeXAtom-ORD"><mo>时</mo></mrow><mrow class="MJX-TeXAtom-ORD"><mo>，</mo></mrow><mrow class="MJX-TeXAtom-ORD"><mo>利</mo></mrow><mrow class="MJX-TeXAtom-ORD"><mo>用</mo></mrow><mrow class="MJX-TeXAtom-ORD"><mo>拆</mo></mrow><mo stretchy="false">(</mo><mrow class="MJX-TeXAtom-ORD"><mo>行</mo></mrow><mo stretchy="false">)</mo><mrow class="MJX-TeXAtom-ORD"><mo>列</mo></mrow><mrow class="MJX-TeXAtom-ORD"><mo>法</mo></mrow><mo>,</mo><mrow class="MJX-TeXAtom-ORD"><mo>即</mo></mrow><mspace linebreak="newline"></mspace><mtable columnalign="right left right left right left right left right left right left" rowspacing="3pt" columnspacing="0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em" displaystyle="true"><mtr><mtd><msub><mi>D</mi><mi>n</mi></msub></mtd><mtd><mi></mi><mo>=</mo><mrow><mo>|</mo><mtable rowspacing="4pt" columnspacing="1em"><mtr><mtd><msub><mi>a</mi><mi>n</mi></msub></mtd><mtd><mi>x</mi></mtd><mtd><mi>x</mi></mtd><mtd><mo>⋯</mo></mtd><mtd><mi>x</mi></mtd></mtr><mtr><mtd><mi>y</mi></mtd><mtd><msub><mi>a</mi><mrow class="MJX-TeXAtom-ORD"><mi>n</mi><mo>−</mo><mn>1</mn></mrow></msub></mtd><mtd><mi>x</mi></mtd><mtd><mo>⋯</mo></mtd><mtd><mi>x</mi></mtd></mtr><mtr><mtd><mi>y</mi></mtd><mtd><mi>y</mi></mtd><mtd><msub><mi>a</mi><mrow class="MJX-TeXAtom-ORD"><mi>n</mi><mo>−</mo><mn>2</mn></mrow></msub></mtd><mtd><mo>⋯</mo></mtd><mtd><mi>x</mi></mtd></mtr><mtr><mtd><mo>⋮</mo></mtd><mtd><mo>⋮</mo></mtd><mtd><mo>⋮</mo></mtd><mtd><mo>⋱</mo></mtd><mtd><mo>⋮</mo></mtd></mtr><mtr><mtd><mi>y</mi></mtd><mtd><mi>y</mi></mtd><mtd><mi>y</mi></mtd><mtd><mo>⋯</mo></mtd><mtd><msub><mi>a</mi><mn>1</mn></msub></mtd></mtr></mtable><mo>|</mo></mrow></mtd></mtr><mtr><mtd></mtd><mtd><mi></mi><mo>=</mo><mrow><mo>|</mo><mtable rowspacing="4pt" columnspacing="1em"><mtr><mtd><msub><mi>a</mi><mi>n</mi></msub></mtd><mtd><mi>x</mi></mtd><mtd><mi>x</mi></mtd><mtd><mo>⋯</mo></mtd><mtd><mi>x</mi><mo>+</mo><mn>0</mn></mtd></mtr><mtr><mtd><mi>y</mi></mtd><mtd><msub><mi>a</mi><mrow class="MJX-TeXAtom-ORD"><mi>n</mi><mo>−</mo><mn>1</mn></mrow></msub></mtd><mtd><mi>x</mi></mtd><mtd><mo>⋯</mo></mtd><mtd><mi>x</mi><mo>+</mo><mn>0</mn></mtd></mtr><mtr><mtd><mi>y</mi></mtd><mtd><mi>y</mi></mtd><mtd><msub><mi>a</mi><mrow class="MJX-TeXAtom-ORD"><mi>n</mi><mo>−</mo><mn>2</mn></mrow></msub></mtd><mtd><mo>⋯</mo></mtd><mtd><mi>x</mi><mo>+</mo><mn>0</mn></mtd></mtr><mtr><mtd><mo>⋮</mo></mtd><mtd><mo>⋮</mo></mtd><mtd><mo>⋮</mo></mtd><mtd><mo>⋱</mo></mtd><mtd><mo>⋮</mo></mtd></mtr><mtr><mtd><mi>y</mi></mtd><mtd><mi>y</mi></mtd><mtd><mi>y</mi></mtd><mtd><mo>⋯</mo></mtd><mtd><mi>y</mi><mo>+</mo><msub><mi>a</mi><mn>1</mn></msub><mo>−</mo><mi>y</mi></mtd></mtr></mtable><mo>|</mo></mrow></mtd></mtr><mtr><mtd></mtd><mtd><mi></mi><mo>=</mo><mrow><mo>|</mo><mtable rowspacing="4pt" columnspacing="1em"><mtr><mtd><msub><mi>a</mi><mi>n</mi></msub></mtd><mtd><mi>x</mi></mtd><mtd><mi>x</mi></mtd><mtd><mo>⋯</mo></mtd><mtd><mi>x</mi></mtd></mtr><mtr><mtd><mi>y</mi></mtd><mtd><msub><mi>a</mi><mrow class="MJX-TeXAtom-ORD"><mi>n</mi><mo>−</mo><mn>1</mn></mrow></msub></mtd><mtd><mi>x</mi></mtd><mtd><mo>⋯</mo></mtd><mtd><mi>x</mi></mtd></mtr><mtr><mtd><mi>y</mi></mtd><mtd><mi>y</mi></mtd><mtd><msub><mi>a</mi><mrow class="MJX-TeXAtom-ORD"><mi>n</mi><mo>−</mo><mn>2</mn></mrow></msub></mtd><mtd><mo>⋯</mo></mtd><mtd><mi>x</mi></mtd></mtr><mtr><mtd><mo>⋮</mo></mtd><mtd><mo>⋮</mo></mtd><mtd><mo>⋮</mo></mtd><mtd><mo>⋱</mo></mtd><mtd><mo>⋮</mo></mtd></mtr><mtr><mtd><mi>y</mi></mtd><mtd><mi>y</mi></mtd><mtd><mi>y</mi></mtd><mtd><mo>⋯</mo></mtd><mtd><mi>y</mi></mtd></mtr></mtable><mo>|</mo></mrow><mo>+</mo><mrow><mo>|</mo><mtable rowspacing="4pt" columnspacing="1em"><mtr><mtd><msub><mi>a</mi><mi>n</mi></msub></mtd><mtd><mi>x</mi></mtd><mtd><mi>x</mi></mtd><mtd><mo>⋯</mo></mtd><mtd><mn>0</mn></mtd></mtr><mtr><mtd><mi>y</mi></mtd><mtd><msub><mi>a</mi><mrow class="MJX-TeXAtom-ORD"><mi>n</mi><mo>−</mo><mn>1</mn></mrow></msub></mtd><mtd><mi>x</mi></mtd><mtd><mo>⋯</mo></mtd><mtd><mn>0</mn></mtd></mtr><mtr><mtd><mi>y</mi></mtd><mtd><mi>y</mi></mtd><mtd><msub><mi>a</mi><mrow class="MJX-TeXAtom-ORD"><mi>n</mi><mo>−</mo><mn>2</mn></mrow></msub></mtd><mtd><mo>⋯</mo></mtd><mtd><mn>0</mn></mtd></mtr><mtr><mtd><mo>⋮</mo></mtd><mtd><mo>⋮</mo></mtd><mtd><mo>⋮</mo></mtd><mtd><mo>⋱</mo></mtd><mtd><mo>⋮</mo></mtd></mtr><mtr><mtd><mi>y</mi></mtd><mtd><mi>y</mi></mtd><mtd><mi>y</mi></mtd><mtd><mo>⋯</mo></mtd><mtd><msub><mi>a</mi><mn>1</mn></msub><mo>−</mo><mi>y</mi></mtd></mtr></mtable><mo>|</mo></mrow></mtd></mtr><mtr><mtd></mtd><mtd><mi></mi><mo stretchy="false">(</mo><mrow class="MJX-TeXAtom-ORD"><mo>左</mo></mrow><mrow class="MJX-TeXAtom-ORD"><mo>边</mo></mrow><mrow class="MJX-TeXAtom-ORD"><mo>行</mo></mrow><mrow class="MJX-TeXAtom-ORD"><mo>列</mo></mrow><mrow class="MJX-TeXAtom-ORD"><mo>式</mo></mrow><mrow class="MJX-TeXAtom-ORD"><mo>的</mo></mrow><mn>1</mn><mrow class="MJX-TeXAtom-ORD"><mo>至</mo></mrow><mi>n</mi><mo>−</mo><mn>1</mn><mrow class="MJX-TeXAtom-ORD"><mo>列</mo></mrow><mrow class="MJX-TeXAtom-ORD"><mo>分</mo></mrow><mrow class="MJX-TeXAtom-ORD"><mo>别</mo></mrow><mrow class="MJX-TeXAtom-ORD"><mo>减</mo></mrow><mrow class="MJX-TeXAtom-ORD"><mo>去</mo></mrow><mrow class="MJX-TeXAtom-ORD"><mo>第</mo></mrow><mi>n</mi><mrow class="MJX-TeXAtom-ORD"><mo>列</mo></mrow><mo>,</mo><mrow class="MJX-TeXAtom-ORD"><mo>右</mo></mrow><mrow class="MJX-TeXAtom-ORD"><mo>边</mo></mrow><mrow class="MJX-TeXAtom-ORD"><mo>行</mo></mrow><mrow class="MJX-TeXAtom-ORD"><mo>列</mo></mrow><mrow class="MJX-TeXAtom-ORD"><mo>式</mo></mrow><mrow class="MJX-TeXAtom-ORD"><mo>按</mo></mrow><mrow class="MJX-TeXAtom-ORD"><mo>最</mo></mrow><mrow class="MJX-TeXAtom-ORD"><mo>后</mo></mrow><mrow class="MJX-TeXAtom-ORD"><mo>一</mo></mrow><mrow class="MJX-TeXAtom-ORD"><mo>列</mo></mrow><mrow class="MJX-TeXAtom-ORD"><mo>展</mo></mrow><mrow class="MJX-TeXAtom-ORD"><mo>开</mo></mrow><mo stretchy="false">)</mo></mtd></mtr><mtr><mtd></mtd><mtd><mi></mi><mo>=</mo><mrow><mo>|</mo><mtable rowspacing="4pt" columnspacing="1em"><mtr><mtd><msub><mi>a</mi><mi>n</mi></msub><mo>−</mo><mi>x</mi></mtd><mtd><mn>0</mn></mtd><mtd><mn>0</mn></mtd><mtd><mo>⋯</mo></mtd><mtd><mi>x</mi></mtd></mtr><mtr><mtd><mi>y</mi><mo>−</mo><mi>x</mi></mtd><mtd><msub><mi>a</mi><mrow class="MJX-TeXAtom-ORD"><mi>n</mi><mo>−</mo><mn>1</mn></mrow></msub><mo>−</mo><mi>x</mi></mtd><mtd><mn>0</mn></mtd><mtd><mo>⋯</mo></mtd><mtd><mi>x</mi></mtd></mtr><mtr><mtd><mi>y</mi><mo>−</mo><mi>x</mi></mtd><mtd><mi>y</mi><mo>−</mo><mi>x</mi></mtd><mtd><msub><mi>a</mi><mrow class="MJX-TeXAtom-ORD"><mi>n</mi><mo>−</mo><mn>2</mn></mrow></msub><mo>−</mo><mi>x</mi></mtd><mtd><mo>⋯</mo></mtd><mtd><mi>x</mi></mtd></mtr><mtr><mtd><mo>⋮</mo></mtd><mtd><mo>⋮</mo></mtd><mtd><mo>⋮</mo></mtd><mtd><mo>⋱</mo></mtd><mtd><mo>⋮</mo></mtd></mtr><mtr><mtd><mn>0</mn></mtd><mtd><mn>0</mn></mtd><mtd><mn>0</mn></mtd><mtd><mo>⋯</mo></mtd><mtd><mi>y</mi></mtd></mtr></mtable><mo>|</mo></mrow><mo>+</mo><mo stretchy="false">(</mo><msub><mi>a</mi><mn>1</mn></msub><mo>−</mo><mi>y</mi><mo stretchy="false">)</mo><msub><mi>D</mi><mrow class="MJX-TeXAtom-ORD"><mi>n</mi><mo>−</mo><mn>1</mn></mrow></msub></mtd></mtr><mlabeledtr><mtd id="mjx-eqn-1"><mtext>(1)</mtext></mtd><mtd></mtd><mtd><mi></mi><mo>=</mo><mi>y</mi><mo stretchy="false">(</mo><msub><mi>a</mi><mn>2</mn></msub><mo>−</mo><mi>x</mi><mo stretchy="false">)</mo><mo stretchy="false">(</mo><msub><mi>a</mi><mn>3</mn></msub><mo>−</mo><mi>x</mi><mo stretchy="false">)</mo><mo>⋯</mo><mo stretchy="false">(</mo><msub><mi>a</mi><mi>n</mi></msub><mo>−</mo><mi>x</mi><mo stretchy="false">)</mo><mo>+</mo><mo stretchy="false">(</mo><msub><mi>a</mi><mn>1</mn></msub><mo>−</mo><mi>y</mi><mo stretchy="false">)</mo><msub><mi>D</mi><mrow class="MJX-TeXAtom-ORD"><mi>n</mi><mo>−</mo><mn>1</mn></mrow></msub></mtd></mlabeledtr><mtr><mtd><mrow class="MJX-TeXAtom-ORD"><mo>同</mo></mrow><mrow class="MJX-TeXAtom-ORD"><mo>理</mo></mrow><mrow class="MJX-TeXAtom-ORD"><mo>可</mo></mrow><mrow class="MJX-TeXAtom-ORD"><mo>得</mo></mrow></mtd></mtr><mlabeledtr><mtd id="mjx-eqn-2"><mtext>(2)</mtext></mtd><mtd><msub><mi>D</mi><mi>n</mi></msub></mtd><mtd><mi></mi><mo>=</mo><mi>x</mi><mo stretchy="false">(</mo><msub><mi>a</mi><mn>2</mn></msub><mo>−</mo><mi>y</mi><mo stretchy="false">)</mo><mo stretchy="false">(</mo><msub><mi>a</mi><mn>3</mn></msub><mo>−</mo><mi>y</mi><mo stretchy="false">)</mo><mo>⋯</mo><mo stretchy="false">(</mo><msub><mi>a</mi><mi>n</mi></msub><mo>−</mo><mi>y</mi><mo stretchy="false">)</mo><mo>+</mo><mo stretchy="false">(</mo><msub><mi>a</mi><mn>1</mn></msub><mo>−</mo><mi>x</mi><mo stretchy="false">)</mo><msub><mi>D</mi><mrow class="MJX-TeXAtom-ORD"><mi>n</mi><mo>−</mo><mn>1</mn></mrow></msub></mtd></mlabeledtr><mtr><mtd><mo stretchy="false">(</mo><mn>1</mn><mo stretchy="false">)</mo><mo>×</mo></mtd><mtd><mi></mi><mo stretchy="false">(</mo><msub><mi>a</mi><mn>1</mn></msub><mo>−</mo><mi>x</mi><mo stretchy="false">)</mo><mo>−</mo><mo stretchy="false">(</mo><mn>2</mn><mo stretchy="false">)</mo><mo>×</mo><mo stretchy="false">(</mo><msub><mi>a</mi><mn>1</mn></msub><mo>−</mo><mi>y</mi><mo stretchy="false">)</mo><mrow class="MJX-TeXAtom-ORD"><mo>得</mo></mrow></mtd></mtr><mtr><mtd></mtd><mtd><mi></mi><mo stretchy="false">(</mo><mi>y</mi><mo>−</mo><mi>x</mi><mo stretchy="false">)</mo><msub><mi>D</mi><mi>n</mi></msub><mo>=</mo><mi>y</mi><munderover><mo>∏</mo><mrow class="MJX-TeXAtom-ORD"><mi>i</mi><mo>=</mo><mn>1</mn></mrow><mi>n</mi></munderover><mo stretchy="false">(</mo><msub><mi>a</mi><mi>i</mi></msub><mo>−</mo><mi>x</mi><mo stretchy="false">)</mo><mo>−</mo><mi>x</mi><munderover><mo>∏</mo><mrow class="MJX-TeXAtom-ORD"><mi>i</mi><mo>=</mo><mn>1</mn></mrow><mi>n</mi></munderover><mo stretchy="false">(</mo><msub><mi>a</mi><mi>i</mi></msub><mo>−</mo><mi>y</mi><mo stretchy="false">)</mo></mtd></mtr><mtr><mtd><mrow class="MJX-TeXAtom-ORD"><mo>故</mo></mrow></mtd><mtd><msub><mi>D</mi><mi>n</mi></msub><mo>=</mo><mfrac><mn>1</mn><mrow><mi>y</mi><mo>−</mo><mi>x</mi></mrow></mfrac><mrow><mo>[</mo><mrow><mi>y</mi><munderover><mo>∏</mo><mrow class="MJX-TeXAtom-ORD"><mi>i</mi><mo>=</mo><mn>1</mn></mrow><mi>n</mi></munderover><mo stretchy="false">(</mo><msub><mi>a</mi><mi>i</mi></msub><mo>−</mo><mi>x</mi><mo stretchy="false">)</mo><mo>−</mo><mi>x</mi><munderover><mo>∏</mo><mrow class="MJX-TeXAtom-ORD"><mi>i</mi><mo>=</mo><mn>1</mn></mrow><mi>n</mi></munderover><mo stretchy="false">(</mo><msub><mi>a</mi><mi>i</mi></msub><mo>−</mo><mi>y</mi><mo stretchy="false">)</mo></mrow><mo>]</mo></mrow></mtd></mtr></mtable></math></span></span></div><script type="math/tex; mode=display" id="MathJax-Element-1">
设D_n=
\begin{vmatrix}
a_n & x & x & \cdots & x \\
y & a_{n-1} & x & \cdots & x \\
y & y & a_{n-2} & \cdots & x \\
\vdots & \vdots & \vdots & \ddots & \vdots \\
y & y & y & \cdots & a_1\\
\end{vmatrix}\\
当x\neq y时，利用拆(行)列法,即\\
\begin{align}
D_n&=
\begin{vmatrix}
a_n & x & x & \cdots & x \\
y & a_{n-1} & x & \cdots & x \\
y & y & a_{n-2} & \cdots & x \\
\vdots & \vdots & \vdots & \ddots & \vdots \\
y & y & y & \cdots & a_1\\
\end{vmatrix}\\
&=
\begin{vmatrix}
a_n & x & x & \cdots & x+0 \\
y & a_{n-1} & x & \cdots & x+0 \\
y & y & a_{n-2} & \cdots & x+0 \\
\vdots & \vdots & \vdots & \ddots & \vdots \\
y & y & y & \cdots & y+a_1-y\\
\end{vmatrix}\\
&=
\begin{vmatrix}
a_n & x & x & \cdots & x \\
y & a_{n-1} & x & \cdots & x \\
y & y & a_{n-2} & \cdots & x \\
\vdots & \vdots & \vdots & \ddots & \vdots \\
y & y & y & \cdots & y\\
\end{vmatrix}
+
\begin{vmatrix}
a_n & x & x & \cdots & 0 \\
y & a_{n-1} & x & \cdots & 0 \\
y & y & a_{n-2} & \cdots & 0 \\
\vdots & \vdots & \vdots & \ddots & \vdots \\
y & y & y & \cdots & a_1-y\\
\end{vmatrix}\\
&(左边行列式的1至n-1列分别减去第n列,右边行列式按最后一列展开)\\
&=
\begin{vmatrix}
a_n-x & 0 & 0 & \cdots & x \\
y-x & a_{n-1}-x & 0 & \cdots & x \\
y-x & y-x & a_{n-2}-x & \cdots & x \\
\vdots & \vdots & \vdots & \ddots & \vdots \\
0 & 0 & 0 & \cdots & y\\
\end{vmatrix}
+
(a_1-y)D_{n-1}\\
&=
y(a_2-x)(a_3-x)\cdots (a_n-x)+(a_1-y)D_{n-1} \tag{1}\\
同理可得\\
D_n &= x(a_2-y)(a_3-y)\cdots (a_n-y)+(a_1-x)D_{n-1} \tag{2}\\
(1)\times &(a_1-x) - (2) \times (a_1-y)得\\
&(y-x)D_n=y \prod_{i=1}^n (a_i-x) - x \prod_{i=1}^n (a_i-y)\\
故 &D_n=\frac{1}{y-x}\left[y \prod_{i=1}^n (a_i-x) - x \prod_{i=1}^n (a_i-y)\right]\\

\end{align}
</script></x-eqn>
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